Chapter 2: Ethernet & Data Encapsulation

Question 1

1000 0000

Answer 1

128

Question 2

1100 0000

Answer 2

192

Question 3

1110 0000

Answer 3

224

Question 4

1111 0000

Answer 4

240

Question 5

1111 1000

Answer 5

248

Question 6

1111 1100

Answer 6

252

Question 7

1111 1110

Answer 7

254

Question 8

1111 1111

Answer 8

255

Question 9

0000

Answer 9

0

Question 10

0001

Answer 10

1

Question 11

0011

Answer 11

3

Question 12

0111

Answer 12

7

Question 13

1111

Answer 13

15 / F

Question 14

0100

Answer 14

4

Question 15

0101

Answer 15

5

Question 16

1000

Answer 16

8

Question 17

1001

Answer 17

9

Question 18

1010

Answer 18

10 / A

Question 19

1011

Answer 19

11 / B

Question 20

1100

Answer 20

12 / C

Question 21

1101

Answer 21

13 / D

Question 22

1110

Answer 22

14 / E

Question 23

Which Ethernet specifications are part of the IEEE 802.3u standard?

Answer 23

Fast Ethernet: 100Base-TX, 100BaseT4, and 100Base-FX

Question 24

Which Ethernet specifications are part of the IEEE 802.3ae standard?

Answer 24

10GBase-SR, -LR, -ER, -SW, -LW, and - E

Question 25

Which Ethernet specifications are part of the IEEE 802.3ab standard?

Answer 25

1Gbps on twisted-pair

Question 26

Which Ethernet specifications are part of the IEEE 802.3z standard?

Answer 26

1000Base-CX - Copper twisted-pair called twinax, uses HSSDC.

Question 27

What is a HSSDC?

Answer 27

High Speed Serial Data Connector used in 1000Base-CX

Question 28

What OSI layer is responsible for combining bits into bytes and bytes into frames?

Answer 28

Data Link Layer

Question 29

A straight-through cable is used to connect which devices?

Answer 29

Host to switch or hub.

Router to switch or hub.

Question 30

In TCP, how is a virtual circuit defined?

Answer 30

By the source and destination port number as well as source and destination IP address.

Question 31

What layer is responsible for finding the destination hardware address where the packet should be sent on the local network?

Answer 31

The Network Layer

Question 32

What are the three layers of the Cisco Hierarchical Model?

Answer 32

Core, Distribution, and Access

Question 33

What are the primary functions of the Distribution Layer?

Answer 33

Provide routing, filtering, and WAN access and to determine how packets can access the core, if needed.

Question 34

What is the purpose of the Access Layer?

Answer 34

Controls user and workgroup access to internetwork resources. (Creation of separate collision domains. Use of access control and policies)

Question 35

What are the fields in the Data Link portion of an Ethernet frame?

Answer 35

Preamble, Start Frame Delimiter, Destination MAC address, Source MAC address, Length or Type, Data, and Frame Check Sequence.

Question 36

What is the Cisco Core Layer responsible for?

Answer 36

Transporting large amounts of traffic both reliably and quickly.