1
Refer to the exhibit. The link between the CTRL and BR_1 routers is configured as shown in the exhibit. Why are the routers unable to establish a PPP session?
The clock rate must be 56000.
The usernames are misconfigured.
The IP addresses are on different subnets.
The clock rate is configured on the wrong end of the link.
The CHAP passwords must be different on the two routers.
Interface serial 0/0/0 on CTRL must connect to interface serial 0/0/1 on BR_1.
2
Refer to the exhibit. A host connected to Fa0/0 is unable to acquire an IP address from this DHCP server. The output of the debug ip dhcp server command shows "DHCPD: there is no address pool for 192.168.1.1". What is the problem?
The 192.168.1.1 address has not been excluded from the DHCP pool.
The pool of addresses for the 192Network pool is incorrect.
The default router for the 192Network pool is incorrect.
The 192.168.1.1 address is already configured on Fa0/0.
3
What three statements describe the roles of devices in a WAN? (Choose three.)
A CSU/DSU terminates a digital local loop.
A modem terminates a digital local loop.
A CSU/DSU terminates an analog local loop.
A modem terminates an analog local loop.
A router is commonly considered a DTE device.
A router is commonly considered a DCE device.
4
Which two statements are true about IPv6? (Choose two.)
Security options are build into IPv6.
IPv6 addresses require less router overhead to process.
IPv6 can only be configured on an interface that does not have IPv4 on it.
There is no way to translate between IPv4 addresses and IPv6 addresses.
When enabled on a router, IPv6 can automatically configure link-local IPv6 addresses on all interfaces.
5
Refer to the exhibit. What can be concluded from the exhibited output of the debug ip nat command?
The 10.1.1.225 host is exchanging packets with the 192.168.0.10 host.
The native 10.1.200.254 address is being translated to 192.168.0.10.
The 192.168.0.0/24 network is the inside network.
Port address translation is in effect.
6
A network administrator is working with an applications team to fix a problem that a server based application is having with response time. The administrator has examined the network portions of the data path and identified several possible problem areas. The applications team has simultaneously identified potential issues with the current release of software. The network administrator begins addressing the network issues while the applications team implements software patches.
Which statement applies to this situation?
Changes to the network will reveal problems that are caused by the new patches.
Scheduling will be more difficult if the network and software teams work independently.
It will be difficult to isolate the problem if two teams are implementing changes independently.
Results from changes will be easier to reconcile and document if each team works in isolation.
7
Refer to the exhibit. You are a network administrator who has been tasked with completing the Frame Relay topology that interconnects two remote sites. How should the point-to-point subinterfaces be configured on HQ to complete the topology?
HQ(config-subif)#frame-relay interface-dlci 103 on Serial 0/0/0.1
HQ(config-subif)#frame-relay interface-dlci 203 on Serial 0/0/0.2
HQ(config-subif)#frame-relay interface-dlci 301 on Serial 0/0/0.1
HQ(config-subif)# frame-relay interface-dlci 302 on Serial 0/0/0.2
HQ(config-subif)#frame-relay map ip 172.16.1.1 103 broadcast on Serial 0/0/0.1
HQ(config-subif)#frame-relay map ip 172.16.2.2 203 broadcast on Serial 0/0/0.2
HQ(config-subif)#frame-relay map ip 172.16.1.1 301 broadcast on Serial 0/0/0.1
HQ(config-subif)#frame-relay map ip 172.16.2.2 302 broadcast on Serial 0/0/0.2
8
A network administrator is instructing a technician on best practices for applying ACLs. Which suggestion should the administrator provide?
Named ACLs are less efficient than numbered ACLs.
Standard ACLs should be applied closest to the core layer.
ACLs applied to outbound interfaces are the most efficient.
Extended ACLs should be applied closest to the source that is specified by the ACL.
9
What are the symptoms when the s0/0/0 interface on a router is attached to an operational CSU/DSU that is generating a clock signal, but the far end router on the point-to-point link has not been activated?
show controllers indicates cable type DCE V.35. show interfaces s0/0/0 indicates serial down, line protocol down.
show controllers indicates cable type DCE V.35. show interfaces s0/0/0 indicates serial up, line protocol down.
show controllers indicates cable type DTE V.35. show interfaces s0/0/0 indicates serial up, line protocol down.
show controllers indicates cable type DTE V.35. show interfaces s0/0/0 indicates serial down, line protocol down.
10
Refer to the exhibit. Which statement correctly describes how Router1 processes an FTP request entering interface s0/0/0, destined for an FTP server at IP address 192.168.1.5?
It matches the incoming packet to the access-list 201 permit any any statement and allows the packet into the router.
It reaches the end of ACL 101 without matching a condition and drops the packet because there is no access-list 101 permit any any statement.
It matches the incoming packet to the access-list 101 permit ip any 192.168.1.0 0.0.0.255 statement, ignores the remaining statements in ACL 101, and allows the packet into the router.
It matches the incoming packet to the access-list 201 deny icmp 192.168.1.0 0.0.0.255 any statement, continues comparing the packet to the remaining statements in ACL 201 to ensure that no subsequent statements allow FTP, and then drops the packet.
11
What will be the result of adding the command ip dhcp excluded-address 172.16.4.1 172.16.4.5 to the configuration of a local router that has been configured as a DHCP server?
Traffic that is destined for 172.16.4.1 and 172.16.4.5 will be dropped by the router.
Traffic will not be routed from clients with addresses between 172.16.4.1 and 172.16.4.5.
The DHCP server function of the router will not issue the addresses between 172.16.4.1 and 172.16.4.5.
The router will ignore all traffic that comes from the DHCP servers with addresses 172.16.4.1 and 172.16.4.5.
12
What is a major characteristic of a worm?
malicious software that copies itself into other executable programs
tricks users into running the infected software
a set of computer instructions that lies dormant until triggered by a specific event
exploits vulnerabilities with the intent of propagating itself across a network
13
Refer to the exhibit. Company ABC expanded its business and recently opened a new branch office in another country. IPv6 addresses have been used for the company network. The data servers Server1 and Server2 run applications which require end-to-end functionality, with unmodified packets that are forwarded from the source to the destination. The edge routers R1 and R2 support dual stack configuration. What solution should be deployed at the edge of the company network in order to successfully interconnect both offices?
a new WAN service supporting only IPv6
NAT overload to map inside IPv6 addresses to outside IPv4 address
a manually configured IPv6 tunnel between the edge routers R1 and R2
static NAT to map inside IPv6 addresses of the servers to an outside IPv4 address and dynamic NAT for the rest of the inside IPv6 addresses
14
A system administrator must provide Internet connectivity for ten hosts in a small remote office. The ISP has assigned two public IP addresses to this remote office. How can the system administrator configure the router to provide Internet access to all ten users at the same time?
Configure DHCP and static NAT.
Configure dynamic NAT for ten users.
Configure static NAT for all ten users.
Configure dynamic NAT with overload.
15
Which three functions are provided by the Local Management Interface used in Frame Relay networks? (Choose three.)
exchange information about the status of virtual circuits
map DLCIs to network addresses
provide flow control
provide error notification
provide congestion notification
send keepalive packets to verify operation of the PVC
16
Refer to the exhibit. R1 is performing NAT overload for the 10.1.1.0/24 inside network. Host A has sent a packet to the web server. What is the destination IP address of the return packet from the web server?
10.1.1.2:1234
172.30.20.1:1234
172.30.20.1:3333
192.168.1.2:80
17
Refer to the exhibit. A packet is being sent from Host A to Host B through the VPN tunnel between R1 and R3. When the packet first arrives at R3, what are the source and destination IP addresses of the packet?
Source 192.168.1.2 - Destination 192.168.4.2
Source 192.168.3.1 - Destination 192.168.3.2
Source 192.168.2.1 - Destination 192.168.3.2
Source 192.168.3.1 - Destination 192.168.4.2
18
Which three guidelines would help contribute to creating a strong password policy? (Choose three.)
Once a good password is created, do not change it.
Deliberately misspell words when creating passwords.
Create passwords that are at least 8 characters in length.
Use combinations of upper case, lower case, and special characters.
Write passwords in locations that can be easily retrieved to avoid being locked out.
Use long words found in the dictionary to make passwords that are easy to remember.
19
A router in a Frame Relay network needs to forward a message received from a host. What two methods does the router use to identify the correct VC to forward the message? (Choose two.)
The router forwards the frame to all ports in the network and learns the address from the reply frame.
The destination host IP address is embedded in the DLCI.
The router searches Inverse ARP tables for maps of DLCIs to IP addresses.
A table of static mappings can be searched.
The router broadcasts a request for the required IP address.
20
What can a network administrator do to recover from a lost router password?
use the copy tftp: flash: command
boot the router to bootROM mode and enter the b command to load the IOS manually
telnet from another router and issue the show running-config command to view the password
boot the router to ROM monitor mode and configure the router to ignore the startup configuration when it initializes
21
Refer to the exhibit. The network administrator is adding R1 to an existing network. As a part of the corporate IT procedures, the administrator attempts to back up the router Cisco IOS software of R1 and receives the output shown. The network administrator then attempts unsuccessfully to ping the TFTP server from the console session. What should be done next to isolate this problem?
From R2, validate that interface Fa0/0 is operational.
From the TFTP server, verify that the software on the TFTP server is operational.
From the TFTP server, confirm there is enough room on the TFTP server for the Cisco IOS software.
From the console session, make sure that R1 has a route to the network where the TFTP server resides.
22
Which statement is true regarding wildcard masks?
The wildcard mask and subnet mask perform the same function.
The wildcard mask is always the inverse of the subnet mask.
A "0" in the wildcard mask identifies IP address bits that must be checked.
A "1" in the wildcard mask identifies a network or subnet bit.
23
Refer to the exhibit. The SSH connections between the remote user and the server are failing. The correct configuration of NAT has been verified. What is the most likely cause of the problem?
SSH is unable to pass through NAT.
There are incorrect access control list entries.
The access list has the incorrect port number for SSH.
The ip helper command is required on S0/0/0 to allow inbound connections.
24
Refer to the exhibit. What is placed in the address field in the header of a frame that will travel from the DC office of ABC Company to the Orlando office?
MAC address of the Orlando router
MAC address of the DC router
192.168.1.25
192.168.1.26
DLCI 100
DLCI 200
25
Which three statements accurately describe a security policy? (Choose three.)
It creates a basis for legal action if necessary.
It defines a process for managing security violations.
It defines acceptable and unacceptable use of network resources.
The remote access policy is a component of the security policy that governs acceptable use of e-mail systems.
It is kept private from users to prevent the possibility of circumventing security measures.
It provides step-by-step procedures to harden routers and other network devices.
26
What functionality do access control lists provide when implementing dynamic NAT on a Cisco router?
defines which addresses can be translated
defines which addresses are assigned to a NAT pool
defines which addresses are allowed out of the router
defines which addresses can be accessed from the inside network
27
Refer to the exhibit. This serial interface is not functioning correctly. Based on the output shown, what is the most likely cause?
improper LMI type
interface reset
PPP negotiation failure
unplugged cable
28
What are two main components of data confidentiality? (Choose two.)
checksum
digital certificates
encapsulation
encryption
hashing
29
Refer to the exhibit. Partial results of the show access-lists and show ip interface FastEthernet 0/1 commands for router R3 are shown. There are no other ACLs in effect. Host A is unable to telnet to host B. Which action will correct the problem but still restrict other traffic between the two networks?
Apply the ACL in the inbound direction.
Apply the ACL on the FastEthernet 0/0 interface.
Reverse the order of the TCP protocol statements in the ACL.
Modify the second entry in the list to permit tcp host 192.168.10.10 any eq telnet .
30
Which combination of Layer 2 protocol and authentication should be used to establish a link without sending authentication information in plain text between a Cisco and a non-Cisco router?
PPP with PAP
PPP with CHAP
HDLC with PAP
HDLC with CHAP
31
Refer to the exhibit. A network administrator has issued the commands that are shown on Router1 and Router2. A later review of the routing tables reveals that neither router is learning the LAN network of the neighbor router. What is most likely the problem with the RIPng configuration?
The serial interfaces are in different subnets.
The RIPng process is not enabled on interfaces.
The RIPng network command is not configured.
The RIPng processes do not match between Router1 and Router2.
32
Refer to the exhibit. What happens if the network administrator issues the commands shown when an ACL called Managers already exists on the router?
The commands overwrite the existing Managers ACL.
The commands are added at the end of the existing Managers ACL.
The network administrator receives an error stating that the ACL already exists.
The commands will create a duplicate Managers ACL containing only the new commands being entered.
33
Refer to the exhibit. How is the TCP/IP configuration information specified by the default-router and dns-server commands made available?
The TCP/IP information is forwarded to a 10.0.1.3 to be supplied to DHCP clients.
The TCP/IP information is used by DHCP clients that are configured to request a configuration from R1.
The TCP/IP information is supplied to any DHCP client on the network connected to the FastEthernet 0/0 interface of R1.
The TCP/IP information is applied to each packet that enters R1 through the FastEthernet 0/0 interface that are hosts on the 10.0.1.0 /24 network except packets from addresses 10.0.1.2, 10.0.1.16, and 10.0.1.254.
34
Which statement about a VPN is true?
VPN link establishment and maintenance is provided by LCP.
DLCI addresses are used to identify each end of the VPN tunnel.
VPNs use virtual Layer 3 connections that are routed through the Internet.
Only IP packets can be encapsulated by a VPN for tunneling through the Internet.
35
A technician is talking to a colleague at a rival company and comparing DSL transfer rates between the two companies. Both companies are in the same city, use the same service provider, and have the same rate/service plan. What is the explanation for why Company A reports higher download speeds than Company B?
Company B has a higher volume of POTS voice traffic than Company A.
Company B shares the conection to the DSLAM with more clients than Company A.
Company A only uses microfilters on branch locations.
Company A is closer to the service provider.
36
Refer to the exhibit. Branch A has a Cisco router. Branch B has a non-Cisco router set for IETF encapsulation. After the commands shown are entered, R2 and R3 fail to establish the PVC. The R2 LMI is Cisco, and the R3 LMI is ANSI. The LMI is successfully established at both locations. Why is the PVC failing?
The PVC to R3 must be point-to-point.
LMI types must match on each end of a PVC.
The ietf parameter is missing from the frame-relay map ip 10.10.10.3 203 command.
The PVCs at R2 use different encapsulation types. A single port can only support one encapsulation type.
37
At what physical location does the responsibilty for a WAN connection change from the user to the service provider?
demilitarized zone (DMZ)
demarcation point
local loop
cloud
38
What effect would the Router1(config-ext-nacl)# permit tcp 172.16.4.0 0.0.0.255 any eq www command have when implemented inbound on the f0/0 interface?
All TCP traffic is permitted, and all other traffic is denied.
The command is rejected by the router because it is incomplete.
All traffic from 172.16.4.0/24 is permitted anywhere on any port.
Traffic originating from 172.16.4.0/24 is permitted to all TCP port 80 destinations.
39
Which three items are LCP options that can be configured for PPP? (Choose three.)
CHAP
Stacker
IPCP
CDPCP
Multilink
40
Refer to the exhibit. Which two conclusions can be drawn from the output shown? (Choose two.)
This network is experiencing congestion.
The Frame Relay connection is in the process of negotiation.
Data is not flowing in this network.
The network is discarding eligible packets.
The DLCI is globally significant.
41
Which wireless solution can provide mobile users with non line-of-sight broadband Internet access at speeds comparable to DSL or cable?
Wi-Fi
WiMAX
satellite
Metro Ethernet
42
Refer to the exhibit. From the output of the show interface commands, at which OSI layer is a fault indicated?
application
transport
network
data link
physical
43
When configuring a Frame Relay connection, what are two instances when a static Frame Relay map should be used? (Choose two.)
when the remote router is a non-Cisco router
when the remote router does not support Inverse ARP
when the local router is using IOS Release 11.1 or earlier
when broadcast traffic and multicast traffic over the PVC must be controlled
when globally significant rather than locally significant DLCIs are being used
44
A network administrator added two switches and a new VLAN over the past weekend. How can the administrator determine if the additions and changes improved performance and availability on the company intranet?
Perform a baseline test and compare the current values to values that were obtained in previous weeks.
Interview departmental secretaries and determine if they think load time for web pages is improved.
Compare the hit counts on the company web server for the current week to the values that were recorded from previous weeks.
Performance on the intranet can be determined by monitoring load times of company web pages from remote sites.
45
Refer to the exhibit. The network administrator creates a standard access control list to prohibit traffic from the 192.168.1.0/24 network from reaching the 192.168.2.0/24 network while still permitting Internet access for all networks. On which router interface and in which direction should it be applied?
interface fa0/0/0, inbound
interface fa0/0/0, outbound
interface fa0/0/1, inbound
interface fa0/0/1, outbound
46
A technician has been asked to run Cisco SDM one-step lockdown on the router of a customer. What will be the result of this process?
Traffic is only forwarded from SDM-trusted Cisco routers.
Security testing is performed and the results are saved as a text file stored in NVRAM.
The router is tested for potential security problems and any necessary changes are made.
All traffic entering the router is quarantined and checked for viruses before being forwarded.
47
A company is looking for a WAN solution to connect its headquarters site with four remote sites. What advantage would dedicated leased lines provide to the customer compared to a shared Frame Relay solution?
lower cost
lower latency and jitter
variable bandwidth capacity
fewer physical router interfaces
48
Which three statements are true about creating and applying access lists? (Choose three.)
Access list entries should filter in the order from general to specific.
One access list per port per protocol per direction is permitted.
Standard ACLs should be applied closest to the source while extended ACLs should be applied closest to the destination.
There is an implicit deny at the end of all access lists.
Statements are processed sequentially from top to bottom until a match is found.
The inbound keyword refers to traffic entering the network from the router interface where the ACL is applied.
49
An administrator is unable to receive e-mail. While troubleshooting the problem, the administrator is able to ping the local mail server IP address successfully from a remote network and can successfully resolve the mail server name to an IP address via the use of the nslookup command. At what OSI layer is the problem most likely to be found?
physical layer
data link layer
network layer
application layer
50
Refer to the exhibit. A network administrator is trying to configure a router to use SDM but it is not functioning correctly. What could be the problem?
The username and password are not configured correctly.
The authentication method is not configured correctly.
The HTTP timeout policy is not configured correctly.
The vtys are not configured correctly.
51
An administrator is configuring a dual stack router with IPv6 and IPv4 using RIPng. The administrator receives an error message when trying to enter the IPv4 routes into RIPng. What is the cause of the problem?
RIPng is incompatible with dual-stack technology.
All interfaces have been configured with the incorrect IPv4 addresses.
RIPv1 or RIPv2 needs to be configured in addition to RIPng to successfully use IPv4.
When IPv4 and IPv6 are configured on the same interface, all IPv4 addresses are shut down in favor of the newer technology.
52
Refer to the exhibit. RIPv2 has been configured on all routers in the network. Routers R1 and R3 do not receive RIP routing updates. On the basis of the provided configuration, what should be enabled on router R2 to remedy the problem?
proxy ARP
CDP updates
SNMP services
RIP authentication
53
Refer to the exhibit. A technician issues the show interface s0/0/0 command on R1 while troubleshooting a network problem. What two conclusions can be determined by from the output shown? (Choose two.)
The bandwidth has been set to the value of a T1 line.
This interface should be configured for PPP encapsulation.
There is no failure indicated in an OSI Layer 1 or Layer 2.
The physical connection between the two routers has failed.
The IP address of S0/0/0 is invalid, given the subnet mask being used.
CCNA 4 Module 8 v.4
| Which two pieces of information are typically found on a logical network diagram? (Choose two.) | |
| cable types | |
| connector types | |
| interface identifiers | |
| DLCI for virtual circuits | |
| operating system versions | |
| Excessive broadcasts are generally a symptom of a problem at which layer? | |
| physical | |
| data link | |
| network | |
| transport | |
| What is one example of a physical layer problem? | |
| incorrect encapsulation | |
| incorrect STP configuration | |
| incorrect ARP mapping | |
| incorrect clock rate | |
| Which two components should be taken into consideration when establishing a network baseline? (Choose two.) | |
| information about the network design | |
| IP addressing allocation on the network | |
| requirements about the service provider setup | |
| requirements for access control lists to regulate traffic | |
| expected performance under normal operating conditions | |
|
| |
| Record the information about the devices discovered in the Campus network only. | |
| Record the information about the devices discovered in the entire network, including the remote locations. | |
| Transfer any information about the devices from the network configuration table that corresponds to a component of the topology diagram. | |
| Transfer only the Layer 2 and Layer 3 information about the devices from the network configuration table that corresponds to a component of the topology diagram. | |
| Transfer the recorded information about the devices from the network configuration table gathered during peak network utilization that corresponds to a component of the topology diagram. | |
| Which two statements are true concerning logical networking models? (Choose two.) | |
| TCP/IP splits the lowest layer of the OSI model into two separate layers. | |
| The top layer of the TCP/IP model combines the functions of the top three OSI layers. | |
| Troubleshooting with the TCP/IP model requires different techniques than with the OSI model. | |
| The network access layer is responsible for exchanging packets between devices on a TCP/IP network. | |
| The Internet layer provides communication between applications, such as FTP, HTTP, and SMTP on separate hosts. | |
| The TCP/IP network access layer corresponds to the OSI physical and data link layers. | |
| Clients across the company are reporting poor performance across all corporate applications running in the data center. Internet access and applications running across the corporate WAN are performing normally. The network administrator observes a continual broadcast of random meaningless traffic (jabber) on the application server LAN in the data center on a protocol analyzer. How should the administrator start troubleshooting? | |
| The jabber in the data center indicates a local physical layer problem. Use the protocol analyzer to determine the source of the jabber, and then check for a recent NIC driver update or bad cabling. | |
| Because all clients are experiencing application problems, the administrator should use a top-down approach with the application servers in the data center. | |
| The scope of the problem indicates a likely routing or spanning-tree problem. Begin by checking routing tables, and follow up using appropriate STP show commands to find a loop if routing is working normally. | |
| Poll the staff to determine if any recent changes have been made. Back out all the changes one by one until the error condition is fixed. | |
| Which troubleshooting approach is suggested for dealing with a complex problem that is suspected of being caused by faulty network cabling? | |
| bottom up | |
| top down | |
| divide and conquer | |
| middle out | |
| A technician has been asked to make several changes to the configuration and topology of a network and then determine the outcome of the changes. What tool can be used to determine the overall effect caused by the changes? | |
| baselining tool | |
| knowledge base | |
| protocol analyzer | |
| cable tester | |
| A technician has been asked to troubleshoot an existing switched network but is unable to locate documentation for the VLAN configuration. Which troubleshooting tool allows the technician to map and discover VLAN and port assignments? | |
| cable analyzer | |
| network analyzer | |
| protocol analyzer | |
| knowledge base | |
|
| |
| physical | |
| data link | |
| network | |
| application | |
| When gathering symptoms for troubleshooting a network problem, which step could result in getting an external administrator involved in the process? | |
| narrowing the scope | |
| gathering symptoms from suspect devices | |
| analyzing existing symptoms | |
| determining ownership | |
|
| |
| A carrier detect signal is present. | |
| Keepalives are being received successfully. | |
| Default encapsulation is used on this serial link. | |
| Packets passing this interface cannot exceed 1 KB in size. | |
| The reliability of this link is very low. | |
| The LCP negotiation phase is complete. | |
|
| |
| The web server should be tested for an application layer problem. | |
| Frame Relay at R3 and R2 should be tested to narrow the scope of the problem. | |
| The fact that users at Branch A are working normally proves that there is no problem at R2. | |
| An ACL entry error could cause the failure at Layer 4 in either R3 or R2. | |
| The successful ping from R3 to R1 proves that the WAN is functioning normally. Therefore, the problem has to be in the upper layers. | |
| Users are complaining of very long wait times to access resources on the network. The show interface command reveals collision counts far above the network baseline. At which OSI layer should the administrator begin troubleshooting? | |
| application | |
| transport | |
| network | |
| data link | |
| physical | |
| Encapsulation errors from mismatched WAN protocols on a serial link between two routers indicate a problem at which OSI layer? | |
| physical | |
| data link | |
| network | |
| transport | |
| What combination of IP address and wildcard mask should be used to specify only the last 8 addresses in the subnet 192.168.3.32/28? | |
| 192.168.3.32 0.0.0.7 | |
| 192.168.3.32 0.0.0.15 | |
| 192.168.3.40 0.0.0.7 | |
| 192.168.3.40 0.0.0.15 | |
| A network administrator has received complaints that users on a local LAN can retrieve e-mail from a remote e-mail server but are unable to open web pages on the same server. Services at which two layers of the OSI model should be investigated during the troubleshooting process? (Choose two.) | |
| physical layer | |
| data link layer | |
| network layer | |
| transport layer | |
| application layer | |
| Information about which OSI layers of connected Cisco devices can be verified with the show cdp neighbors command? | |
| All layers | |
| Layer 1, Layer 2, and Layer 3 | |
| Layer 1, Layer 2, Layer 3, and Layer 4 | |
| Layer 6 and Layer 7 | |
| Which three approaches should be used when attempting to gather data from users for troubleshooting? (Choose three.) | |
| Determine fault. | |
| Get to know the user to build trust. | |
| Obtain information by asking simple pertinent questions. | |
| Impress the user with use of technical language and skills. | |
| Determine if the problem is related to time or a specific event. | |
| Determine if the user can re-create the problem or events leading to the problem. | |
CCNA 4 Module 7 v.4
|
| |
| The DHCP server service is not enabled. | |
| The inside interface for DCHP is not defined. | |
| The DHCP pool is not bound to the interface. | |
| The pool does not have a default router defined for the clients. | |
| All the host addresses have been excluded from the DHCP pool. | |
|
| |
| The addresses are statically assigned by the network administrator. | |
| The DHCP server dynamically assigns the addresses. | |
| The addresses must be listed under the DHCP pool of addresses before they are available for static assignment. | |
| The addresses must be listed under the DHCP pool of addresses before they are available for dynamic assignment. | |
|
| |
| 1 | |
| 6 | |
| 7 | |
| 8 | |
| 9 | |
| What are two benefits of NAT? (Choose two.) | |
| It saves public IP addresses. | |
| It adds a degree of privacy and security to a network. | |
| It increases routing performance. | |
| It makes troubleshooting routing issues easier. | |
| It makes tunneling with IPsec less complicated. | |
| What is true regarding the differences between NAT and PAT? | |
| PAT uses the word "overload" at the end of the access-list statement to share a single registered address. | |
| Static NAT allows an unregistered address to map to multiple registered addresses. | |
| Dynamic NAT allows hosts to receive the same global address each time external access is required. | |
| PAT uses unique source port numbers to distinguish between translations. | |
| What type of NAT should a network administrator use to ensure that a web server on the inside network is always available to the outside network? | |
| NAT overload | |
| static NAT | |
| dynamic NAT | |
| PAT | |
|
| |
| 10.1.1.2 | |
| 192.168.0.100 | |
| 209.165.20.25 | |
| any address in the 10.1.1.0 network | |
|
| |
| Traffic from the 10.1.1.0 network will be translated. | |
| Traffic from the 209.165.200.0 network will be translated. | |
| Permitted traffic gets translated to a single inside global IP address. | |
| A pool of inside global IP addresses from the 10.1.1.0 network will be used for translation. | |
| External users from the 209.165.200.0 network can reach private addresses on the 10.1.1.0 and 10.1.2.0 networks. | |
|
| |
| defines which addresses can be translated | |
| defines which addresses are allowed into the router | |
| defines which addresses are assigned to a NAT pool | |
| defines which addresses are allowed out of the router | |
| A technician has been told by a supervisor to always clear any dynamic translations before attempting to troubleshoot a failed NAT connection. Why has the supervisor issued these instructions? | |
| The supervisor wants to clear any confidential information that may be seen by the technician. | |
| Because entries can be cached for long periods of time, the supervisor wants to prevent decisions being made based on old data. | |
| The translation table may be full and is unable to make new translations until space is available. | |
| Clearing the translations causes the starting configuration to be reread and may correct translation problems that have occurred. | |
|
| |
| ip nat pool statement | |
| access-list statement | |
| ip nat inside is on the wrong interface | |
| interface s0/0/2 should be a private IP address | |
|
| |
| A user on the inside sees web traffic coming from 192.168.1.3 using port 8080. | |
| The address 172.16.1.1 is translated into an address from the pool beginning with 192.168.1.3. | |
| A user on the outside network sees a request addressed from 192.168.1.3 using port 80. | |
| A user on the outside must address traffic to port 8080 to reach the address 172.16.1.1. | |
|
| |
| 0 | |
| 1 | |
| 2 | |
| 3 | |
| 4 | |
| A network administrator wants to connect two IPv6 islands. The easiest way is through a public network that uses only IPv4 equipment. What simple solution solves the problem? | |
| Replace the devices on the public network with devices that support IPv6. | |
| Configure RIPng on the border routers of each IPv6 island. | |
| Configure the routers to take advantage of dual-stack technology. | |
| Use tunneling to encapsulate the IPv6 traffic in the IPv4 protocol. | |
| After activating IPv6 routing on a Cisco router and programming IPv6 addresses on multiple interfaces, what is the remaining step to activate RIPng? | |
| Enter the interface programming mode for each IPv6 interface and enable IPng RIP. | |
| Enter the ipv6 router rip name command and then use network statements to activate RIPng on the interfaces. | |
| Enter the router rip command, and then activate RIPng using the version command. RIPng then automatically runs on all IPv6 interfaces. | |
| Enter the interface programming mode for each IPv6 interface and enable the multicast group FF02::9, and then activate RIPng globally using the ipv6 router rip name command. | |
|
| |
| dynamic NAT | |
| NAT with overloading | |
| open port 20 | |
| open port 21 | |
| open port 23 | |
| NAT with port forwarding | |
|
| |
| 10.1.1.1 | |
| 172.30.20.2 | |
| 192.168.1.2 | |
| 255.255.255.255 | |
|
| |
| 10.0.0.125 | |
| 179.9.8.95 | |
| 179.9.8.98 | |
| 179.9.8.101 | |
| 179.9.8.112 | |
|
| |
| It will randomly generate a 64 bit interface ID. | |
| It will assign an address from the pool of IPv6 private addresses to the interface. | |
| It will assign only the registry prefix of the IPv6 Global Unicast address to the interface. | |
| The configuration will derive the interface portion of the IPv6 address from the MAC address of the interface. | |
| How many bits of an IPv6 address are used to identify the interface ID? | |
| 32 | |
| 48 | |
| 64 | |
| 128 | |
| Your organization is issued the IPv6 prefix of 2001:0000:130F::/48 by your service provider. With this prefix, how many bits are available for your organization to create subnetworks? | |
| 8 | |
| 16 | |
| 80 | |
| 128 | |
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