Chapter 3 Flashcards
An Internet protocol used to map an IP address to a MAC address. Defined in RFC 826.
ARP
On an IP host, the 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.
default gateway/default router
An application layer protocol used throughout the Internet for translating hostnames into their associated IP addresses.
DNS
A specific carrier/metro Ethernet service defined by MEF (MEF.net) that provides a point-to-point topology between two customer devices, much as if the two devices were connected using an Ethernet crossover cable.
Ethernet Line Service(E-Line)
A type of WAN that is connected primarily through Ethernet cabling
Ethernet WAN
A bit-oriented synchronous data-link layer protocol developed by the International Organization for Standardization (ISO).
HDLC
The alphanumeric name of an IP host
hostname
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. The network and subnetwork numbers together are used for routing, and the host number is used to address an individual host within the network or subnetwork.
IPv4 Address
a 128-bit address assigned to hosts using TCP/IP. Addresses use different formats, commonly using a routing prefix, subnet, and interface ID, subnet, and host parts of an address.
IPv6 Address
An IP header, followed by the data encapsulated after the IP header, but specifically not including any headers and trailers for layers below the network layer.
IP packet
Subdivisions of a Class A, B, or C network, as configured by a network administrator.__________allow a single Class A, B, or C network to be used instead of multiple networks, and still allow for a large number of groups of IP addresses, as is required for efficient IP routing.
IP subnet
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.
leased line
An Internet Control Message Protocol (ICMP) echo message and its reply; often is used in IP networks to test the reachability of a network device.
Ping
give routers a means by which to learn routes to all the IP subnets in an internetwork.
routing protocols
A list of routes in a router, with each route listing the destination subnet and mask, the router interface out which to forward packets destined to that subnet, and as needed, the next-hop router’s IP address.
routing table
