CIS 403 Exam 2 Possible Questions

Which of the following are valid network identifiers for Class A addresses?

1-126

Which of the following is a Class A broadcast?

11.255.255.255

If your Class C address has a three-bit subnet mask, which of the following would be a subnetwork identifier?

203.16.34.32

Which of the following Class C IP addresses is a broadcast (assuming the subnet mask is 255.255.255.224)?

219.129.32.63

Which of the following would be a broadcast address for a Class C network?

221.21.23.255

What would the value of the last octet of the subnet mask be if the CIDR notation for an address is 192.168.1.16/28?

240

What would the value of the first octet of the subnet mask be if the CIDR notation for an address is 192.168.1.16/27?

255

Assuming that the address 165.24.3.6 uses the correct default mask, what is the host identifier?

3.6

For a Class B broadcast, which octets will be completely binary ones?

3rd and 4th

A subnet mask of 255.255.252.0 on a Class B network indicates that ___ bits have been borrowed from the host portion to subnet the network.

6

How many bits (maximum) can be used from the last octet of a Class C address to subnet your network?

6

What is true regarding IPv6?

Addresses are expressed in hexadecimal/Most Cisco systems support IPv6

If, after connecting to the router via HyperTerminal, you see only illegible characters in the terminal window, what should you try?

Adjust the baud rate

How does CIDR conserve IP addresses?

By allocating IP network numbers on criteria other than traditional bit boundaries

_____ is based on assigning IP addresses on criteria other than octet boundaries.

CIDR

Which of the following address classes allows you to borrow a maximum of 14 bits to create a subnet mask?

Class B

In a _____ the router updates carry subnet mask information and allow different masks to be used on different subnets.

Classless

If you need to abort a command in the middle of execution, which key sequence should you press simultaneously?

Ctrl - C

With a _____ configuration mode, you can configure the virtual terminal, console, and auxiliary lines that let you access the router.

Line

What is the purpose of the reserved numbers in a Class D address?

Multicast

By default, which of the router's components stores the backup configuration file?

NVRAM

Which of the following routing protocols support VLSM?

OSPF/EIGRP

The CIDR addressing method allows the use of _____ to designate the number of network bits in the mask.

Prefix

User mode does not allow to configure the router, to do this you must go into _____ EXEC mode.

Privileged

Which of the following commands will allow you to type a banner for your router?

Router(config)# banner motd @

What does the sh ru command show you?

Running configuration

In a Class C address, which octets identify the network?

The 1st three octets

Given the address 190.14.20.255/20, which of the following statements is true?

This is a host address/This address is on network 190.14.16.0

Given the address 190.14.20.0/22, which of the following statements is true?

This is a network address/This address is on network 190.14.20.0

What is the purpose of summarization?

To reduce the number of routing table entries

True or False? Contents of ROM is maintained, even when router is rebooted.

True

True or False? IP has 32 bits, divided into 4 octets.

True

Class B addresses allow you to configure how many octets on your network for host IP addresses?

Two

When the prompt displays a >, the router is in _____ EXEC mode.

User

If you enter a VTY password during the automated setup routine, to which VTY will it apply?

VTY 0/VTY 1/VTY 2/VTY 3/VTY 4

What does VTY 1 stand for?

Virtual terminal one

The running configuration is also known as the _____.

Working configuration/Current configuration

If you type e? at the router(config)# prompt, what is the result of the command?

You will see a list of usable commands at the global configuration mode prompt that begin with the letter "e"

What are the two different levels of setup when using the system configuration dialog?

basic and extended

From the router# prompt and the terminal, what must you type to enter global configuration mode?

conf t

How do you save your changes to the configuration file to NVRAM?

copy run start

Which of te following commands will allow you to enter privileged EXEC mode from the router> prompt?

en/ena/enable/enab/enabl

Which password do you use instead of the enable password?

enable secret

Which password is encrypted by default?

enable secret

If you are at the router(config-if)# prompt and you press the Ctrl+Z keys simultaneously, which prompt will you see next?

router#

If you are in global configuration mode, which router prompt will you see?

router#

From which of the following prompts can you modify the terminal VTY password?

router(config-line)#

What three commands can you use in privileged EXEC mode to alter the router configuration?

setup, erase, and copy

How do network administrators access a VTY?

telnet

Given the following CIDR address and mask, which of the following is a broadcast on its subnetwork 162.17.12.125/24?

162.17.12.255

You can configure description for each of the interfaces physically attached to your router by using _____ command.

Description

What is the purpose of the reserved numbers in a Class E address?

Experimental

True of False? The location of network numbers based on CIDR has led to depletion of IP addresses.

False

By default (during normal boot operations), where does the router look first for a working version of the Cisco IOS?

Flash

_____ is the most important layer 3 security protocol.

IPSEC

What are some reasons to switch to IPv6?

IPv6 is inherently more secure/There is more address space available with IPv6/Broadcasting will be replaced with multicasting