Chapter 3 - WANs and IP Routing Flashcards
Leased Line
A serial communications circuit between two points.
Wide-Area Network (WAN)
A part of a larger network that implements mostly OSI Layer 1 and 2 technology, connects sites that typically sit far apart.
Telco
A common abbreviation for telephone company
Serial Interface
Type of interface on a router, used to connect to some types of WAN links, particularly leased lines and Frame Relay access links.
HDLC
High-Level Data Link Control. A bit-oriented synchronous data-link layer protocol developed by the International Organization for Standardization (ISO).
Ethernet over MPLS (EoMPLS)
How a service provider can create an Ethernet WAN service using an MPLS network. Ethernet WAN services.
Ethernet Line Service (E-Line)
A specific carrier / metro Ethernet service defined by MEF (MEF.net) that provides a point-to-point topology between two customer devices.
Default Router (Default Gateway)
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.
Routing Table
A list of routes in a router, with each route listing the destination subnet and mask. Next-hop router’s ip address.
IP Network
An IPv4 Class A, B, or C network
IP Subnet
Subdivisions of a Class A, B, or C network, as configured by a network administrator.
IP Packet
An IP header, followed by the data encapsulated after the IP header.
Routing Protocol
A protocol that defines packets that can be routed by a router.
Dotted-Decimal Notation (DDN)
The format used for IP version 4 addresses, in which four decimal values are used, separated by periods (dots).
IPv4 Address
Literally, the version of the Internet Protocol defined in an old RFC 791, standardized in 1980.
Unicast IP Address
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.
Subnetting
The process of subdividing a Class A, B, or C network into smaller groups called subnets.
Hostname
The alphanumeric name of an IP host
DNS
Domain Name System. An application layer protocol used throughout the Internet for translating hostnames into their associated IP addresses.
ARP
Address Resolution Protocol. An Internet protocol used to map an IP address to a MAC address. Defined in RFC 826.
Ping
An Internet Control Message Protocol (ICMP) echo message and its reply.
