chapter 4

Question 1

what is a collision Domain?

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Answer 1

when one or more computers or networking devices attempt to send data at the same time to one computer, server, or other network device.

Question 2

what is a Carrier Sense Multiple Access/Collision Detection, CSMA/CD ?
91

Answer 2

• is a Media Access Control (MAC) protocol.
• It defines how network devices respond when two devices attempt to use a data channel simultaneously and encounter a data collision. The CSMA/CD rules define how long the device should wait if a collision occurs.

Question 3

we can run full duplex with any device except a hub. T/F

93

Answer 3

True

Question 4

what is the deference between half duplex and full duplex Ethernet?
94

Answer 4

half duplex Ethernet shares a collision domain and provides a lower effective throughput then full duplex Ethernet, which has a private collision domain and a higher effective throughput.

Question 5

there are no collision in full duplex mode. T/F

94

Answer 5

True

Question 6

a dedicated switch port is required for each full duplex host. T/F
94

Answer 6

True

Question 7

Ethernet at the Data Link layer is responsible of what ?

94

Answer 7

1- Ethernet addressing ( MAC Addressing ).

2- Framing packets received from the network layer.

Question 8

how many bits are in nibble?

94

Answer 8

4 bits

Question 9

what are nibble values?

95

Answer 9

8 4 2 1

Question 10

what is Hexadecimal?

95

Answer 10

the hexadecimal numbering system uses combinations of 16 character digits to represent all numerical values. Hexadecimal uses all ten numbers in the decimal system (0, 1, 2, 3, 4, 5, 6, 7, 8, and 9) and letters A through F.

Question 11

what is MAC?

98

Answer 11

Short for Medium Access Control, or MAC address. Known as a physical address and hardware address, it is a 48 bit address whose number is uniquely formatted in hexadecimal format and given to each computer or network device on a computer network.

Question 12

a very popular implementation of Ethernet over coax, also known as thinnet that has a maximum speed of 10Mbps and a maximum transmission distance of 185 meter per segment.
105

Answer 12

10Base2

Question 13

Thick Ethernet or Thicknet, is an IEEE standard for baseband Ethernet at 10MBps over thick coaxial cable. it has a maximum distance of 500 meters.
105

Answer 13

10BaseE5

Question 14

is a 10 Mbps CSMA/CD Ethernet LAN that works on Category 3 or better twisted-pair cables ( UTP ). it can be up to 100 meters in length.

Answer 14

10BaseT

Question 15

is a 100Mbps Ethernet that works on category 5, the cable s used are UTP or STP and can be up to 100 meters.
105

Answer 15

100BaseTX

Question 16

is a 10 Mbps is an Ethernet over fiber Optic to the Desktop, it can go from 500 meters to 2000 meters.
105

Answer 16

100BaseFL

Question 17

it work on MMF and has a maximum speed of 100Mbps and can go up to 2000 meters.
105

Answer 17

100baseFX

Question 18

this Ethernet uses a UTP cable, it has a maximum speed of 1000Mbps and can reach a maximum distance of 100 meters.

Answer 18

1000BaseT

Question 19

this Ethernet uses a SC fiber connector and a MMF cable, it has a maximum speed of 1000Mbps and can reach up to 550 meters.

Answer 19

1000BaseSX