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WAN Implementation Terms

Terms in this set (16)

Wide area network
Two or more local area networks (LANs) connected together, usually spanning a wide geographical area.
Private WAN
A private WAN uses communication channels that are not publically accessible to allow sites within the private network to communicate.
Public WAN
A public WAN allows access to any number of other sites, like the internet.
Multi-Protocol Label Switching
A high-performance method for forwarding packets through a network. MPLS reduces the number of routing lookups by using labels and label switching to forward packets. Packets are forwarded based on the contents of the label, without examination of the packet.
Leased line
A dedicated, always-on circuit between two endpoints usually obtained through a service provider.
High-level Data Link Control
Often used as the data link protocol for WAN leased-line connections.
CPE
Customer Premise Equipment (CPE) is the equipment at the customer site.
Channel Service UnitData Service Unit (DSU)
A digital-interface device used to connect DTE, such as a router, to a digital circuit, such as T1 line.
Data Communications Equipment
A device that sits between the DTE and a data transmission circuit, like a modem.
Data Terminal Equipment
An end instrument that converts user information into signals or converts received signals into user information, like a computer terminal.
Network Address Translation
Allows you to connect a private network to the internet without obtaining registered addresses for every host.
Port Address Translation
Is used to translate multiple inside addresses to a single public address using unique, dynamic ports. It is also known as NAT Overloading or Overloaded NAT.
Static NAT
Translates a single outside address to a single inside address
Dynamic NAT
Translates a range of outside addresses to a range of inside addresses.
show [parameters]
A router command used to show routing information, interface information, IP routing, configuration files, and serial interface configuration.
traceroute [parameters]
A router command used to verify Network layer connectivity between two points. It can also be used to test DNS address resolution.
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