Chapter 3

Question 1

DSL

Answer 1

Digital Subscriber Line. Public network technology that delivers high bandwidth over conventional telco local-loop copper wiring at limited distances. Typically used as an Internet access technology, connecting a user to an ISP.

Digital Subscriber Line. High Bandwidth. Local-loop copper wiring. Limited distances.

Question 2

Serial Interface

Answer 2

A type of interface on a router, used to connect to some types of WAN links, particularly leased lines and frame relay access links.

Connects some WAN links, usually leased lines and frame relay access links.

Question 3

Ethernet over MPLS

Answer 3

A term referring specifically to how a service provider can create an Ethernet WAN service using an MPLS network. More generally, a term referring to Ethernet WAN services.

Create a Ethernet WAN using a MPLS network. AKA Ethernet WAN Services.

Question 4

HDLC

Answer 4

High-Level Data Link Control. A bit-oriented synchronous protocol developed by the International Organization for Standardization (ISO AKA IOS).

Question 5

Cable internet

Answer 5

An Internet access technology that uses cable tv (catv) cable, normally used for video, to send and receive data.

Internet Access Tech. Uses CATV cable. Send and Receive data normally used for video.

Question 6

Wide-area network (WAN)

Answer 6

A part of a larger network that implements mostly OSI Layer 1 and 2 technology, connects sites that typically sit far apart, and uses a business model in which a consumer (individual or business) must lease the WAN from a service provider (often a telco).

Part of a larger network. Mostly Layer 1 and 2. For far apart sites. Must lease WAN from provider.

Question 7

Leased line

Answer 7

A serial communications circuit between two points, provided by some service provider, typically a telephone company (telco). Because the telco does not sell a physical cable between the two endpoints, instead charging a monthly fee for the ability to send bits between the two sites, the service is considered to be a leased service.

Serial circuit between two points from a provider. They do not sell the physical cable, just ability to send bits.

Question 8

Telco

Answer 8

A common abbreviation for telephone company.