Chapter 3 - WANs and IP Routing

Question 1

Leased Line

Answer 1

A serial communications circuit between two points.

Question 2

Wide-Area Network (WAN)

Answer 2

A part of a larger network that implements mostly OSI Layer 1 and 2 technology, connects sites that typically sit far apart.

Question 3

Telco

Answer 3

A common abbreviation for telephone company

Question 4

Serial Interface

Answer 4

Type of interface on a router, used to connect to some types of WAN links, particularly leased lines and Frame Relay access links.

Question 5

HDLC

Answer 5

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

Question 6

Ethernet over MPLS (EoMPLS)

Answer 6

How a service provider can create an Ethernet WAN service using an MPLS network. Ethernet WAN services.

Question 7

Ethernet Line Service (E-Line)

Answer 7

A specific carrier / metro Ethernet service defined by MEF (MEF.net) that provides a point-to-point topology between two customer devices.

Question 8

Default Router (Default Gateway)

Answer 8

IP address of some router to which the host sends packets when the packet’s destination address is on a subnet other than the local subnet.

Question 9

Routing Table

Answer 9

A list of routes in a router, with each route listing the destination subnet and mask. Next-hop router’s ip address.

Question 10

IP Network

Answer 10

An IPv4 Class A, B, or C network

Question 11

IP Subnet

Answer 11

Subdivisions of a Class A, B, or C network, as configured by a network administrator.

Question 12

IP Packet

Answer 12

An IP header, followed by the data encapsulated after the IP header.

Question 13

Routing Protocol

Answer 13

A protocol that defines packets that can be routed by a router.

Question 14

Dotted-Decimal Notation (DDN)

Answer 14

The format used for IP version 4 addresses, in which four decimal values are used, separated by periods (dots).

Question 15

IPv4 Address

Answer 15

Literally, the version of the Internet Protocol defined in an old RFC 791, standardized in 1980.

Question 16

Unicast IP Address

Answer 16

In IP version 4 (IPv4), a 32-bit address assigned to hosts using TCP/ IP. Each address consists of a network number, an optional subnetwork number, and a host number.

Question 17

Subnetting

Answer 17

The process of subdividing a Class A, B, or C network into smaller groups called subnets.

Question 18

Hostname

Answer 18

The alphanumeric name of an IP host

Question 19

DNS

Answer 19

Domain Name System. An application layer protocol used throughout the Internet for translating hostnames into their associated IP addresses.

Question 20

ARP

Answer 20

Address Resolution Protocol. An Internet protocol used to map an IP address to a MAC address. Defined in RFC 826.

Question 21

Ping

Answer 21

An Internet Control Message Protocol (ICMP) echo message and its reply.