Testking_640-802_V13

QUESTION NO: 1

The following output was shown on router TestKing3:

Refer to the output of the two show commands in the exhibit above. If the TestKing network administrator tries to ping host 10.1.8.55 from host 10.1.6.100, how will these ICMP packets be processed by Router TestKing3?

A.The packets will be routed out the Fa0/0 interface

B.The packets will be discarded

C.The packets will be routed out the S0/0 interface

D.The packets will be routed out the S0/1 interface

E.None of the above

Answer: D

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QUESTION NO: 2

Router TK1 receives information about network 192.168.111.0/24 from multiple sources. What will TK1 consider the most reliable information about the path to that network?

A.An OSPF update for network 192.168.111.0/16

B.A static route to network 192168.1111.0/24

C.A Directly connected interface with an address of 192.168.1111.254/24

D.A RIP update for network 192.168.1111.0/24

E.A Default route with a next hop address of 192.168.1111.1

F.A static route to network 192.168.1111.0/24 with a local serial interface configured as the next hop

G.None of the above

Answer: C

QUESTION NO: 3

Router TK1 has just received a packet and needs to route it. What two actions must this router take in order to route incoming packets? (Choose two)

A.Inspect the routing table to select the best path to the destination network addresses.

B.Validate sources of routing information.

C.Inspect the ARP table to verify a legitimate source MAC address for each packet.

D.Identify the destination network address of each packet.

E.Verify the receipt of routed packets by the next hop router.

F.Identify the source network address of each packet.

Answer: A, D

Explanation:

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The router decides how to forward an incoming packet by finding the routes that "match" the destination address of the packet, and then forwarding it according to the most narrowly applicable one. A packet matches a route in the following way: a packet has (among other things) a destination address in its header, a route contains either a network or a host address, a network mask (netmask), and instructions on how to forward a packet using the route. The packet matches the route if its destination address is part of the address subspace defined by the network address or exactly matches the host address of the route. A route is more narrowly applicable than another if the address subspace defined by its network address contains fewer actual addresses than the other, which is indicated by the netmask. An entry with a host address, rather than a network address, is the narrowest kind.

QUESTION NO: 4

Part of the TestKing network is shown below:

In this network, host TestKingA has established communications with host TestKingB for the first time. What enabled router TestKing2 to forward this traffic in the appropriate direction to reach the network to which host TestKingB is attached?

A.A default gateway

B.TCP/IP

C.A routing protocol

D.DHCP

E.A Layer 4 protocol

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F.DNS

G.None of the above

Answer: C Explanation:

Routing is the process of selecting paths in a network along which to send data or physical traffic. In order for routers to know how to forward traffic to the correct destinations located on other IP networks, a routing protocol must be enabled, either via the use of a dynamic routing protocol such as RIP or EIGRP, or through the use of static routes.

Section 2: Describe the operation of Cisco routers (including: router bootup process, POST, router components) (23 questions)

QUESTION NO: 1

Exhibit:

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You work as a network technician at TestKing.com. Study the exhibit carefully. For what reasons have this TestKing router loaded its IOS image from the location that is shown? (Choose two)

A.TestKing3 defaulted to ROMMON mode and laded the IOS image from a TFTP server

B.Cisco Routers will first attempt to load an image from TFTP for management purpose

C.Ruouter1 has specific boot system commands that instruct it to load IOS from a TFTP server

D.TestKing3 is acting as a TFTP server fro other routers

E.TestKing3 can't locate valid IOS image in flash memory

Answer: C, E

QUESTION NO: 2

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You work as a network technician at TestKing.com. Study the exhibit carefully. What will router TestKingA do when it starts up next time?

A.start the limited IOS in ROM

B.start in ROM monitor mode

C.retrieve configuration information from the running-config file

D.look for startup instructions in NVRAM

E.load IOS from flash

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Answer: B Explanation:

RAM-Sometimes called DRAM for dynamic random-access memory, RAM is used by the router just as it is used by any other computer: for working storage. The running or active configuration file is stored here.

ROM-This type of memory (read-only memory) stores a bootable IOS image, which typically is not used for normal operation. ROM contains the code that is used to boot the router until the router knows where to get the full IOS image or as a backup bootable image, in case there are problems.

Flash memory-Either an EEPROM or a PCMCIA card, Flash memory stores fully functional IOS images and is the default location where the router gets its IOS at boot time. Flash memory also can be used to store any other files, including configuration files.

NVRAM-Nonvolatile RAM stores the initial or startup configuration file.

IOS on a router uses a configuration file for the initial configuration at router startup and the active, running configuration file. The startup configuration file is in NVRAM; the other file, which is in RAM, is the one that the router uses during operation. When the router first comes up, the router copies the stored configuration file from NVRAM into RAM, so the running and startup configuration files are identical at that point. Also, exterior to the router, configuration files can be stored as ASCII text files anywhere using TFTP or FTP.

The boot process follows this basic litany:

1.The router performs a power-on self-test (POST) to discover and verify the hardware.

2.The router loads and runs bootstrap code from ROM.

3.The router finds the IOS or other software and loads it.

4.The router finds the configuration file and loads it into running config.

Two configuration tools tell the router what OS to load:

1.The configuration register

2.The boot system configuration command

First, the configuration register tells the router whether to use a full-featured IOS,ROMMON, or the limited-feature IOS, which also is called RXBOOT mode. The configuration register is a 16-bit software register in the router, and its value is set using the config-register global configuration command. (Some older routers had a hardware configuration register with jumpers on the processor card, to set bits to a value of 0 or 1.) On most Cisco routers, the default Configuration Register setting is hexadecimal 2102.

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0x2102 : Default, which loads the IOS from Flash Memory 0x2100 : Boot the router in ROM Monitor Mode

0x2142: Boot the router bypassing the startup configuration

QUESTION NO: 3

There are no boot system commands in the router configuration in NVRAM for router TK1. What is the fallback sequence that the router TK1 will use to find an IOS during reload?

A.ROM, NVRAM, TFTP server

B.Flash, TFTP server, ROM

C.TFTP server, Flash, NVRAM

D.Flash, NVRAM, ROM

E.NVRAM, TFTP server, ROM

F.None of the above

Answer: B

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QUESTION NO: 4

During startup, router TK1 displays the following error message:

boot: cannot open "flash:"

What will TK1 do next?

A.It will attempt to locate the configuration file from a TFTP server. If this fails, it will initiate the setup dialog.

B.It will attempt to locate the IOS from a TFTP server. If this fails, it will load a limited IOS from ROM.

C.It will attempt to locate the configuration file from a TFTP server. If this fails, it will load a limited configuration from ROM.

D.Because of damaged flash memory, the router will fail the POST.

E.It will attempt to locate the IOS from a TFTP server. If this fails, it will initiate the setup dialog.

F.None of the above

Answer: B

Explanation:

The boot sequence of a Cisco router is shown below:

Booting up the router and locating the Cisco IOS

1.POST (power on self test)

2.Bootstrap code executed

3.Check Configuration Register value (NVRAM) which can be modified using the config-register command

0 = ROM Monitor mode

1 = ROM IOS

2 - 15 = startup-config in NVRAM

4. Startup-config file: Check for boot system commands (NVRAM) If boot system commands in startup-config

a.Run boot system commands in order they appear in startup-config to locate the IOS

b.[If boot system commands fail, use default fallback sequence to locate the IOS (Flash, TFTP, ROM)?]

If no boot system commands in startup-config use the default fallback sequence in locating the IOS:

a.Flash (sequential)

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b.TFTP server (netboot)

c.ROM (partial IOS) or keep retrying TFTP depending upon router model

5.If IOS is loaded, but there is no startup-config file, the router will use the default fallback sequence for locating the IOS and then it will enter setup mode or the setup dialogue.

6.If no IOS can be loaded, the router will get the partial IOS version from ROM

Reference: http://www.svrops.com/svrops/documents/ciscoboot.htm

QUESTION NO: 5

After logging into a router and typing in a few show commands, you press the up arrow key. What will this do?

A.It will recall the previous command line

B.It will move the cursor one line up

C.It will redisplay the current command line

D.It will capitalize the command line

E.None of the above

Answer: A Explanation:

The up arrow key is used to recall the previous command line entry. The commands that were entered previously can be displayed by repeatedly pressing the up arrow key, or by entering the "show history" command.

QUESTION NO: 6

After working on a router, some problems arise and you wish to view the commands that you recently entered. Which IOS command opens the history buffer and displays the most recently entered commands?

A.Show history

B.Show buffers

C.Show typed commands

D.Show terminal buffer

E.Show command

F.None of the above

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