A means of translating a system’s IP address into another IP address before sending it out to a larger network in order to hide the IP addresses on a private network

Network routes that are entered into a router’s routing table manually

Utility software that records the route between any two hosts on an internetwork.

A Linux application that dynamically updates the routing information to a destination.

A fixed predetermined number assigned to a packet by the sending computer; it defines the function or session type

Routing protocol that uses a link state algorithm and shares more detailed information, called link state advertisements

A device connecting separate networks, which forwards a packet from one network to another based only on the network address of the protocol being used

A distance-vector routing protocol that, to date, has had two versions.

A router or advanced switch that can be configured through a software interface—often via a terminal emulation program

A router that has the function of relaying information to all the other routers in the area.

A NAT function that hides a port number from outside networks, enabling public servers to work behind a NAT router. It gives a server on a private network the protection of NAT, while allowing access to that server from outside the private network.

Where a packet should go when its destination address has a network ID not directly connected to the router

In TCP/IP, a 16-bit number, between 0 and 65535, assigned to a particular TCP/IP session.

One trip through a router by a packet

Identifiers assigned to routers in order to limit traffic to routers within a specified area

A table used by a router to determine where to send each packet, based on its destination network ID address

A type of network address translation (NAT) in which the router maps a single routable (nonprivate) IP address to a single machine, enabling you to access that machine from outside the network. The NAT keeps track of the IP address or addresses, and appli

Software that gives administrators advanced tools that describe, visualize, and configure an entire network with several routers

A router used to communicate between Autonomous Systems to corresponding edge routers in other Autonomous Systems

A router within an autonomous system (AS) that is assigned the role of backup router to the AS’s designated router.

A special serial cable used to connect to a Cisco-brand router in order to perform the initial configuration on the router

A term used by manufactures to refer to either overloaded NAT or port forwarding

The table used by a router in conjunction with Network Address Translation (NAT) to track the IP address of a computer on a private network using a source ephemeral port so it can direct the appropriate incoming traffic to that computer.

A process by which routers in an internetwork automatically exchange information with all other routers, enabling them to build their own list of routers to various networks

Utility software that records the route between any two hosts on an internetwork. Like ping, traceroute sends a single packet to another host, but unlike ping, as the packet progresses, it returns information about every router between the two hosts.