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The Wonderful World of Routing The Wonderful World of Routing The Wonderful World of Routing The Wonderful World of Routing The Wonderful World of Routing
100
What is Network Address Translation (NAT)?
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
100
What is static route?
Network routes that are entered into a router’s routing table manually
100
What is traceroute?
Utility software that records the route between any two hosts on an internetwork.
100
What is My traceroute (mtr)?
A Linux application that dynamically updates the routing information to a destination.
100
What is destination port?
A fixed predetermined number assigned to a packet by the sending computer; it defines the function or session type
200
What is Open Shortest Path First (OSPF)
Routing protocol that uses a link state algorithm and shares more detailed information, called link state advertisements
200
What is a router?
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
200
What is Routing Information Protocol (RIP)
A distance-vector routing protocol that, to date, has had two versions.
200
What is managed device?
A router or advanced switch that can be configured through a software interface—often via a terminal emulation program
200
What is a designated router (DR)?
A router that has the function of relaying information to all the other routers in the area.
300
What is port forwarding?
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.
300
What is next hop?
Where a packet should go when its destination address has a network ID not directly connected to the router
300
What is a port?
In TCP/IP, a 16-bit number, between 0 and 65535, assigned to a particular TCP/IP session.
300
What is a hop?
One trip through a router by a packet
300
What is What is Area ID?
Identifiers assigned to routers in order to limit traffic to routers within a specified area
400
What is a routing table?
A table used by a router to determine where to send each packet, based on its destination network ID address
400
What is Static NAT (SNAT)?
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
400
What is Network Management Software (NMS)?
Software that gives administrators advanced tools that describe, visualize, and configure an entire network with several routers
400
What is edge router?
A router used to communicate between Autonomous Systems to corresponding edge routers in other Autonomous Systems
400
What is a backup designated router (BDR)?
A router within an autonomous system (AS) that is assigned the role of backup router to the AS’s designated router.
500
What is a Yost cable?
A special serial cable used to connect to a Cisco-brand router in order to perform the initial configuration on the router
500
What is Port Address Translation (PAT)?
A term used by manufactures to refer to either overloaded NAT or port forwarding
500
What is NAT translation table?
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.
500
What is dynamic routing?
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
500
What is traceroute?
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.




Managing and Troubleshooting Networks - 11

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