ICND1 - Chapter 2

Question 1

10BASE-T

Answer 1

• 10 refers to the speed supported, in this case 10 Mbps.
• BASE means it is baseband Ethernet.
• T means twisted-pair cable, Category 5 or above.

Question 2

10BASE-T: T/FL and variations

Answer 2

• T: Twisted pair cable
• FL: Fiber Link
• LX: Fiber
• SX: Fiber
• CX: Copper cable

Question 3

Distance limitations for:
10BASE-T
10BASE-FL
100BASE-TX
100BASE-FX
1000BASE-T
1000BASE-LX
1000BASE-SX
1000BASE-CX

Answer 3

10BASE-T		100 m
10BASE-FL		2000 m
100BASE-TX		100 m
100BASE-FX		400 m
1000BASE-T		100 m
1000BASE-LX		550 m if 62.5-micron (μ) 
				or 50-μ mm fiber; 
				10 km if 10-μ sm fiber
1000BASE-SX		250 m if 62.5-μ mm fiber; 
				550 m if 50-μ mm fiber
1000BASE-CX	25 m

Question 4

What is a repeater?

Answer 4

A repeater is a physical layer device that takes a signal from a device on the network and acts as an amplifier.

Question 5

Can we add as many repeaters as we need to extend the LAN?

Answer 5

There are limits on the number of repeaters that can be added to a network.

Question 6

What is a collision?

Answer 6

When two stations attempt to communicate at the same time.

Question 7

When a collision occurs in CSMA/CD, how do the rest of the stations know that a frame needs to be discarded?

Answer 7

The transmitting station sends a ‘jam’ signal for a set period of time. Then before transmitting, it waits until a wait timer expires.

Question 8

Collision domain

Answer 8

The network segments that share the same bandwidth are known as collision domains, because when two or more devices within that segment try to communicate at the same time, collisions can occur.

Question 9

Network segment

Answer 9

A segment is a connection made by a single unbroken network cable.

Question 10

Do bridges and switches get a MAC address assigned for every port they have?

Answer 10

No

Question 11

Startup steps for a Cisco router or switch

Answer 11

1. Find and check device hardware
2. Find and load Cisco IOS software image
3. Find and apply device configuration

Question 12

Option for connecting to device with purposes of configuring it (3)

Answer 12

CON: direct console connection; AUX: From a remote location by dialing into a modem connected to the Cisco device; after device’s VTY ports have been configured, telnet to those VTY ports over the network

Question 13

Differences in cable type for CON vs AUX connection

Answer 13

Console: rollover cable; AUX: straight through serial

Question 14

Separation of EXEC sessions into two modes

Answer 14

User EXEC mode; Privileged EXEC mode

Question 15

Switch between user EXEC and privileged EXEC mode

Answer 15

‘enable’ / ‘disable’

Question 16

If both enable and secret passwords are set…

Answer 16

the secret password is the one that is required