Tag Archives: 640-822 Study Guide

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QUESTION 1
After the router interfaces shown in the diagram have been configured, it is discovered that hosts
in the Branch LAN cannot access the Internet. Further testing reveals additional connectivity
issues. What will fix this problem?

A. Change the address of the HQ router LAN interface.
B. Change the subnet mask of the HQ router LAN interface.
C. Change the address of the Branch router LAN interface.
D. Change the address of the HQ router interface to the Internet.
E. Change the address of the Branch router WAN interface.
F. Change the subnet mask of the HQ router interface to the Internet.

Answer: E

QUESTION 2
Refer to the graphic. A Cisco router and a Catalyst switch are connected as shown. The technician
is working on a computer that is connected to the management console of the switch. In order to
configure the default gateway for the switch, the technician needs to learn the IP address of the
attached router interface. Which IOS command will provide this information in the absence of
Layer 3 connectivity?

A. showcdp neighbors detail
B. pingrouter_ip_address
C. showip neighbors
D. pingswitch_ip_address
E. showdhcp-config
F. showip rarp

Answer: A

Explanation:
To display detailed information about neighboring devices discovered using Cisco Discovery
Protocol (CDP), use the show cdp neighbors privileged EXEC command.
Detail – (Optional) Displays detailed information about a neighbor (or neighbors) including network
address, enabled protocols, hold time, and software version.
The following is sample output for the show cdp neighbors detail command.
router# show cdp neighbors detail
————————-
Device ID: lab-7206
Entry address( es ):
IP address: 172.19.169.83
Platform: cisco 7206VXR, Capabilities: Router
Interface: Ethernet0, Port ID (outgoing port): FastEthernet0/0/0
Holdtime : 123 sec
Version :
Cisco Internetwork Operating System Software
IOS ™ 5800 Software (C5800-P4-M), Version 12.1(2)
Copyright (c) 1986-2002 by Cisco Systems, Inc.
advertisement version: 2
Duplex: half

QUESTION 3
Refer to the exhibit. The ports that are shown are the only active ports on the switch. The MAC
address table is shown in its entirety. The Ethernet frame that is shown arrives at the switch.
What two operations will the switch perform when it receives this frame? (Choose two.)

A. The frame will be forwarded out port fa0/3 only.
B. The frame will be forwarded out fa0/1, fa0/2, and fa0/3.
C. The frame will be forwarded out all the active ports.
D. The MAC address of 0000.00dd.dddd will be added to the MAC address table.
E. The MAC address of 0000.00aa.aaaa will be added to the MAC address table.

Answer: B,E

QUESTION 4
Refer to the exhibit. Workstation A must be able to telnet to switch SW-A through router RTA for
management purposes. What must be configured for this connection to be successful?

A. IP routing on SW-A
B. default gateway on SW-A
C. VLAN 1 on RTA
D. cross-over cable connecting SW-A and RTA

Answer: B

Explanation:
Configure a default gateway on SW-A.
In order for a switch to send traffic to a destination that is not located directly, as is the case in our
example, a default gateway must be configured on the switch. This will enable it to send the traffic
to router RTA where it can be routed to host A.

QUESTION 5
What does the “Inside Global” address represent in the configuration of NAT?

A. a globally unique, private IP address assigned to a host on the inside network
B. the summarized address for all of the internalsubnetted addresses
C. a registered address that represents an inside host to an outside network
D. the MAC address of the router used by inside hosts to connect to the Internet

Answer: C

Explanation:
With NAT, Cisco defines 4 different types of addresses as follows:
Inside local address – The IP address assigned to a host on the inside network. This is the address
configured as a parameter of the computer’s OS or received via dynamic address allocation
protocols such as DHCP. The address is likely not a legitimate IP address assigned by the
Network Information Center (NIC) or service provider.
Inside global address – A legitimate IP address assigned by the NIC or service provider that
represents one or more inside local IP addresses to the outside world.
Outside local address – The IP address of an outside host as it appears to the inside network. Not
necessarily a legitimate address, it is allocated from an address space routable on the inside.
Outside global address – The IP address assigned to a host on the outside network by the host’s
owner. The address is allocated from a globally routable address or network space.
The above definitions still leave a lot to be interpreted. For this example, this document redefines
these terms by first defining “local address” and “global address.” Keep in mind that the terms
“inside” and “outside” are NAT definitions. Interfaces on a NAT router are defined as “inside” or
“outside” with the NAT configuration commands, ip nat inside and ip nat outside . Networks to
which these interfaces connect can then be thought of as “inside” networks or “outside” networks,
respectively.
Local address – A local address is any address that appears on the “inside” portion of the
network.
Global address – A global address is any address that appears on the “outside” portion of the
network.

QUESTION 6
Refer to the exhibit. What does the address 192.168.2.167 represent?

A. the router to which the file startup-config is being transferred
B. the TFTP server from which the file router-confg is being transferred
C. the TFTP server to which the file router-confg is being transferred
D. the TFTP server from which the file startup-config is being transferred
E. the router from which the file startup-config is being transferred
F. the router to which the file router-confg is being transferred

Answer: C

QUESTION 7
Two routers named Atlanta and Brevard are connected by their serial interfaces as shown in the
exhibit, but there is no data connectivity between them. The Atlanta router is known to have a
correct configuration. Given the partial configurations shown in the exhibit, what is the problem on
the Brevard router that is causing the lack of connectivity?

A. The bandwidth setting is incompatible with the connected interface.
B. The maximum transmission unit (MTU) size is too large.
C. The subnet mask is incorrect.
D. The serial line encapsulations are incompatible.
E. A loopback is not set.
F. The IP address is incorrect.

Answer: F

QUESTION 8
The administrator is unable to establish connectivity between two Cisco routers. Upon reviewing
the command output of both routers, what is the most likely cause of the problem?

A. Username/password is incorrectly configured.
B. Router names are incorrectly configured.
C. Serialip addresses
D. Authentication needs to be changed to PAP for both routers.

Answer: A

Explanation:
When setting up local password database in CHAP, configure commands username username
password password in overall configuration mode to add note to local password database. Note
that the username here should be the router name on the opposite side. And the password should
be the same as that in the password database of CHAP authentication server. The above graphic
shows different password.

QUESTION 9
Which of the following are types of flow control? (Choose three.)

A. cut-through
B. load balancing
C. congestion avoidance
D. buffering
E. windowing

Answer: C,D,E

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