WAN Concepts Flashcards
A permanent dedicated connections are required
Leased Line
A point-to-point link is used to provide a pre-established WAN communication path from the customer premises to the provider network
Leased Line
Aadvantages of Leased Lines
Simplicity, Quality, Availability
Disadvantages of Leased Lines
Flexibility, High cost
Use modems and analog dialed telephone lines to provide low capacity and dedicated switched connections
Dialup
Suitable when intermittent, low-volume data transfers are needed
Dialup
Advantages of Dialup
Simplicity, Availability, Low implementation cost
Disadvantages of Dialup
Low data rates and long time needed to form connection
Replaces traditional Frame Relay and ATM WAN links
Ethernet WAN
Uses fibre-optics cabling
Ethernet WAN
Goes by, MetroE, EoMPLS, VPLS
Ethernet WAN
Advantages of Ethernet WAN
Reduced expenses and administration
Easy integration with existing networks
Enhanced business productivity
Dedicated virtual connection for voice or data between a sender and a receiver
Circuit Switching
Splits traffic data into packets that are routed over a shard network
Packet Switching
A circuit switching technology that enables local loop of a PTSN to carry digital signals, resulting in higher capacity switched connections
Integrated Services Digital Network ISDN
Types of ISDN interfaces
Basic Rate Interface (BRI)
Primary Rate Interface (PRI)
Connect multiple sites using PVCs which can carry both voice and data traffic
Frame Relay
Capable of transferring voice, video, and data through private and public networks
Asynchronous Transfer Mode (ATM)
A multiprotocol high-performance WAN technology that directs data from one router to the next. Support wide range of WAN technologies
Multiprotocol Label Switching (MPLS)
A private WAN using satellite communications,
VSAT
A small satellite dish used to create a private WAN that provides connectivity to remote locations
VSAT
Always-on connection technology that uses existing twisted-pair telephone lines to transport high -bandwidth data and provides IP services to subscribers
DSL
Converts an Ethernet signal from the user device to DSL signal, which is transmitted to the central office
DSL Modem
Advantages of DSL
Uses existing telephone lines
Bandwidth from individual user to the ISP is not affected by no. of subscribers
