WAN

Question 1

Frame Relay is considered connection oriented digital WAN link ? (true / false)

Answer 1

True

Question 2

Frame relay is based on packet switching technology ? (True / False)

Answer 2

True

Question 3

Frame Relay has less overhead and latency than X.25?

Answer 3

True. Frame Relay implements no error or flow control, which leads to simplified handling and reduced latency.

Question 4

Frame relay can be used to interconnect LANs?

Answer 4

True.

Question 5

Frame relay is mostly implemented using permanent virtual circuits?

Answer 5

True.

Question 6

Frame Relay is used on circuits ranging from 56kb/s up to 45Mb/s.

Answer 6

True.

Question 7

With frame relay costs are base solely on the distance the packets travel ?

Answer 7

False.

Question 8

Frame Relay is not flexible and will not handle bursts of data ?

Answer 8

False.

Question 9

Frame Relay can use one physical interface for multiple connections ?

Answer 9

True.

Question 10

A switching technology that has pre-established dedicated circuit (or channel) between nodes and terminals.

Answer 10

Circuit Switching

Question 11

A switching technology that establishes routes through the switches for particular end-to-end connections.

Answer 11

Packet Switching

Question 12

A switching technology where a virtual circuit is only physically in existence while a packet is traveling through it.

Answer 12

Connection-oriented Packet Switching

Question 13

A switching technology where each switch must evaluate the address of the packet to determine where to send it.

Answer 13

Connectionless Packet Switching

Question 14

Operates at network layer, and the SVC is identified by a channel number.

Answer 14

X.25

Question 15

Operates at the data link layer, and the PVC is identified by a Data Link Control Identifier (DLCI)

Answer 15

Frame Relay

Question 16

Build on a cell-based architecture in which the cell has a fixed length of 53 bytes.

Answer 16

ATM

Question 17

Provides a high-bandwidth Layer 2 network capable of managing data, voice and video all on the same infrastructure.

Answer 17

Metro Ethernet

Question 18

Which three items are considered to be WAN devices?

• modems
• routers
• L2 switches
• communication servers
• repeaters
• bridges

Answer 18

• modems
• routers
• communication servers

Question 19

Which device is commonly used as Data Terminal Equipment ?

• Modem
• Router
• CSU/DSU

Answer 19

• Router

Question 20

What WAN technology is designed for delivering data, voice, and video simultaneously over a TDM infrastructure?

• ATM
• Cable
• Frame Relay
• ISDN

Answer 20

• ATM

Question 21

Which architecture enables enterprises to offer important network services, such as security, new communication services, and improved application performance to every office regardless of its size or proximity to headquarters ?

Answer 21

Cisco Enterprise Branch Architecture

Question 22

ISDN PRI is composed of how many B channels in North America?

Answer 22

23

Question 23

Which hierarchical design model layer is responsible for containing network problems to the workgroups in which they occur?

Answer 23

Distribution

Question 24

Which term describes the cabling that connects the customer site to the nearest exchange of the WAN service provider?

Answer 24

Local loop

Question 25

Какъв пол е DCE накрайникът ?

Answer 25

Женски

Question 26

Какъв пол е DTE накрайникът ?

Answer 26

Мъжки

Question 27

DCE или DTE кръстосва сигнала ?

Answer 27

DCE

Question 28

Какви са двата вида пинове за трансфер на информация ?

Answer 28

Tx & Rx

Question 29

Какво е PCM и за какво служи ?

Answer 29

Pulse Code Modulation - оригиналният механизъм за конвертиране на аналогов глас в цифров сигнал.

Question 30

С какви параметри семплира PCM ?

Answer 30

64.000 бита на секунда - 8000 семпъла на секунда с 8 битова точност.

Question 31

Какво е DS0 ?

Answer 31

Стандартът, който използват Telco за цифрова линия с капацитет за пренос на глас.

Question 32

Какв е капацитерът на DS0 ?

Answer 32

64-kbps