Networking Standards

Question 1

What is the supported bit rate an bandwidth of 802.11a?

Answer 1

Up to 54 Mb/s
5Gz Band
45.7m

Question 2

What is the supported bit rate an bandwidth of 802.11a?

Answer 2

Up to 11 Mb/s
2.4Gz Band
91m

Question 3

What is the supported bit rate an bandwidth of 802.11c?

Answer 3

Up to 54 Mb/s
2.4Gz Band
91m

Question 4

What is the supported bit rate an bandwidth of 802.11d?

Answer 4

Up to 600 Mb/s
2.4Gz Band
250m

Question 5

What are the disadvantages of 802.11a

Answer 5

It isnt interoperable with 802.11b, 802.11g, 802.11n.

Question 6

What is the supported bit rate an bandwidth of 802.11d?

Answer 6

54 Mbps

Does not support 300Mbps

Question 7

What is coaxial cabling?

Answer 7

• Coaxial cables are usually constructed with copper or aluminium and are used by cable TV companies to provide satellite TV.

Question 8

What is twisted pair cabling?

Answer 8

Twisted Pair Cabling is a type of copper cabling used for telephone communications and most Ethernet networks. Pairs of wires form a circuit that can transmit data over a network. There are two types, Unshielded and Shielded.

Question 9

What is a straight through cable?

Answer 9

• Most common type of cable

* Used to connect a computer to a central connecting device like a switch.

Question 10

What is a crossover cable?

Answer 10

• Used to direct similar devices without using a hub.

Used for p2p (peer-to-peer)

Question 11

What is MDI and MDI-x Ports

Answer 11

• Medium dependent interface (MDI) is a type of Ethernet port connection using twisted pair cabling.
• For computers to communicate with other devices, the wires have to cross somewhere.
• Instead of using crossover cables to connect computers to central connecting devices such as switches, these central connecting devices are equipped with MDI-X ports (medium dependent interface crossover) which take care of the cross.

Question 12

What is near end crosstalk? (NEXT_

Answer 12

Occurs when there is measured interference between two pairs in a single cable, measure on the cable end nearest the trasmitter.

Question 13

What is far end crosstalk? (FEXT)

Answer 13

Occurs when there is a similar interference, measure at the cable end farthest from the transmitter.

Question 14

What is data emanation?

Answer 14

Data emanation is when a electromagnetic filed is generated by a network cable or network device which can be manipulated to eavesdrop on conversations or to steal data.

Question 15

What is a permanent virtual network?

Answer 15

With frame relay, multiple sessions can run simultaneously on the same link.
These connections to the cloud are known as permanent logical links or permanent virtual circuits.

Question 16

What is ISDN?

Answer 16

Integrated services digital network is digital technology developed to combat limitations public switched telephone networks.
Users that have ISDN can send data, fax, or talk on the phone, all simultaneously from one line

Question 17

What is basic rate ISDN (BRI)?

Answer 17

This is 128 kbps with two equal B channels 64 kbps each for data. Generally devices that connect to BRI lines can handle eight simultaneous conenctions to the internet.

Question 18

What is Primary rate ISDN?

Answer 18

This is 1.536 mbps, and it runs on a T-1 circuit

▪ PRI has 23 equal 64kbps B channels for data, along with one 64kbps D channel for timing

Question 19

What is ATM?

Answer 19

Asynchronous transfer mode is a cell-based switching technology.
The cells that are involved are a fixed length, normally around 58 octets. (53 bytes)

Question 20

What is a SONET?

Answer 20

Abbreviation for synchronous optical network.

It transfers data in multiple digital bit streams over fibre optic network.

Question 21

What is FDDI?

Answer 21

Fibre distributed data interefence is a standard for transferring data on fibre optic cables. It uses a ring topology. can extend over 200km.