Question 1

What are the two main types of access control lists (ACLs)? Standard IEEE Extended Specialized

Accepted Answer

Standard and extended access control lists (ACLs) are used to configure security on a router.

Question 2

What PPP protocol provides dynamic addressing, authentication, and multilink?

Accepted Answer

Link Control Protocol in the PPP stack provides dynamic addressing, authentication, and multilink.

Question 3

Which of the following commands will allow you to set your Telnet password on a Cisco router?

Accepted Answer

The command line vty 0 4 places you in a prompt that will allow you to set or change your Telnet password.

Question 4

What protocol does PPP use to identify the Network layer protocol?

Accepted Answer

Network Control Protocol is used to help identify the Network layer protocol used in the packet.

Question 5

How long is an IPv6 address?

Accepted Answer

An IPv6 address is 128 bits long.

Question 6

Which protocol does Ping use?

Accepted Answer

ICMP is the protocol at the Network layer that is used to send echo requests and replies.

Question 7

Where is a hub specified in the OSI model?

Accepted Answer

Hubs regenerate electrical signals, which are specified at the Physical layer.

Question 8

How often are BPDUs sent from a layer 2 device?

Accepted Answer

Every 2 seconds, BPDUs are sent out from all active bridge ports by default.

Question 9

Which class of IP address has the most host addresses available by default?

Accepted Answer

Class A addressing provides 24 bits for host addressing.

Question 10

Which one of the following is true regarding VLANs?

Accepted Answer

Switches do not propagate VLAN information by default; you must configure the VTP domain. VLAN Trunking Protocol (VTP) is used to propagate VLAN information across a trunk link.

Question 11

How many collision domains are created when you segment a network with a 12-port switch?

Accepted Answer

Layer 2 switching creates individual collision domains.

Question 12

What is the main reason the OSI model was created?

Accepted Answer

The primary reason the OSI model was created was so that different networks could inter-operate.

Question 13

What command is used to create a backup configuration?

Accepted Answer

The command to back up the configuration on a router is copy running-config startup-config.

Question 14

If your router is facilitating a CSU/DSU, which of the following commands do you need to use to provide the router with a 64000bps serial link?

Accepted Answer

The clock rate command is two words, and the speed of the line is in bps.

Question 15

In a network with dozens of switches, how many root bridges would you have?

Accepted Answer

You should have only one root bridge per network.

Question 16

What command will display the line, protocol, DLCI, and LMI information of an interface?

Accepted Answer

The show interface command shows the line, protocol, DLCI, and LMI information of an interface.

Question 17

What is a stub network?

Accepted Answer

Stub networks have only one connection to an internetwork. Only default routes can be set on a stub network or network loops may occur.

Question 18

You have 10 users plugged into a hub running 10Mbps half-duplex. There is a server connected to the switch running 10Mbps half-duplex as well. How much bandwidth does each host have to the server?

Accepted Answer

Each device has 10 Mbps to the server.

Question 19

What does a VLAN do?

Accepted Answer

VLANs break up broadcast domains at layer 2.

Question 20

What protocols are used to configure trunking on a switch? VLAN Trunking Protocol VLAN 802.1Q ISL

Accepted Answer

VTP is not right because it has nothing to do with trunking except that it sends VLAN information across a trunk link. 802.1Q and ISL are used to configure trunking on a port.

Networking Basics Questions