WAN Flashcards
Frame Relay is considered connection oriented digital WAN link ? (true / false)
True
Frame relay is based on packet switching technology ? (True / False)
True
Frame Relay has less overhead and latency than X.25?
True. Frame Relay implements no error or flow control, which leads to simplified handling and reduced latency.
Frame relay can be used to interconnect LANs?
True.
Frame relay is mostly implemented using permanent virtual circuits?
True.
Frame Relay is used on circuits ranging from 56kb/s up to 45Mb/s.
True.
With frame relay costs are base solely on the distance the packets travel ?
False.
Frame Relay is not flexible and will not handle bursts of data ?
False.
Frame Relay can use one physical interface for multiple connections ?
True.
A switching technology that has pre-established dedicated circuit (or channel) between nodes and terminals.
Circuit Switching
A switching technology that establishes routes through the switches for particular end-to-end connections.
Packet Switching
A switching technology where a virtual circuit is only physically in existence while a packet is traveling through it.
Connection-oriented Packet Switching
A switching technology where each switch must evaluate the address of the packet to determine where to send it.
Connectionless Packet Switching
Operates at network layer, and the SVC is identified by a channel number.
X.25
Operates at the data link layer, and the PVC is identified by a Data Link Control Identifier (DLCI)
Frame Relay
Build on a cell-based architecture in which the cell has a fixed length of 53 bytes.
ATM
Provides a high-bandwidth Layer 2 network capable of managing data, voice and video all on the same infrastructure.
Metro Ethernet
Which three items are considered to be WAN devices?
- modems
- routers
- L2 switches
- communication servers
- repeaters
- bridges
- modems
- routers
- communication servers
Which device is commonly used as Data Terminal Equipment ?
- Modem
- Router
- CSU/DSU
- Router
What WAN technology is designed for delivering data, voice, and video simultaneously over a TDM infrastructure?
- ATM
- Cable
- Frame Relay
- ISDN
- ATM
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 ?
Cisco Enterprise Branch Architecture
ISDN PRI is composed of how many B channels in North America?
23
Which hierarchical design model layer is responsible for containing network problems to the workgroups in which they occur?
Distribution
Which term describes the cabling that connects the customer site to the nearest exchange of the WAN service provider?
Local loop
Какъв пол е DCE накрайникът ?
Женски
Какъв пол е DTE накрайникът ?
Мъжки
DCE или DTE кръстосва сигнала ?
DCE
Какви са двата вида пинове за трансфер на информация ?
Tx & Rx
Какво е PCM и за какво служи ?
Pulse Code Modulation - оригиналният механизъм за конвертиране на аналогов глас в цифров сигнал.
С какви параметри семплира PCM ?
64.000 бита на секунда - 8000 семпъла на секунда с 8 битова точност.
Какво е DS0 ?
Стандартът, който използват Telco за цифрова линия с капацитет за пренос на глас.
Какв е капацитерът на DS0 ?
64-kbps
