Shared Flashcard Set

Details

Routing Protocol Concepts and Configuration
Terminology and theory related to routing protocols (ch 14).
33
Computer Networking
Not Applicable
04/30/2011

Additional Computer Networking Flashcards

 


 

Cards

Term
network route
Definition
A data transmission path through one or more networks between two end nodes.
Term
route metrics
Definition
The cost in time and resources to send a data packet over that route.
Term
static route
Definition
A route that is manually configured on a router. Includes destination IP, subnet mask, and next-hop-IP (or outgoing interface). Route remains static/unchanged unless reconfigured.
Term
default route
Definition
On a router, the route that is considered to match all packets that are not otherwise matched by some more specific route.
Term
dynamic route
Definition
A route that the router learns from neighboring routers.
Term
routing protocol
Definition
A set of messages and processes with which routers can exchange information about routes to reach subnets in a particular network. Examples of routing protocols include the Enhanced Interior Gateway Routing Protocol (EIGRP), the Open Shortest Path First (OSPF) protocol, and the Routing Information Protocol (RIP).
Term
RIP (acronym)
Definition
Routing Information Protocol
Term
Routing Information Protocol
Definition
An Interior Gateway Protocol (IGP) that uses distance vector logic and router hop count as the metric. RIP Version 1 (RIP-1) has become unpopular, with RIP Version 2 (RIP-2) providing more features, including support for VLSM.
Term
EIGRP (acronym)
Definition
Enhanced Interior Gateway Router Protocol
Term
Enhanced Interior Gateway Router Protocol (EIGRP)
Definition
An advanced distance-vector routing protocol, with optimizations to minimize both the routing instability incurred after topology changes, as well as the use of bandwidth and processing power in the router. Routing information is exchanged only upon the establishment of new neighbor adjacencies, after which only changes are sent.
Term
OSPF (acronym)
Definition
Open Shortest Path First
Term
Open Shortest Path First
Definition
An adaptive routing protocol which uses a link state routing algorithm and operates within a single autonomous system (AS). It gathers link state information from available routers and constructs a topology map of the network. The topology determines the routing table presented to the Internet Layer which makes routing decisions based solely on the destination IP address found in IP packets.
Term
IS-IS (acronym)
Definition
Intermediate System to Intermediate System Routing Protocol
Term
Intermediate System to Intermediate System Routing Protocol
Definition
An interior gateway protocol, designed for use within an administrative domain or network. It is a link-state routing protocol, operating by reliably flooding link state information throughout a network of routers. Each ___ router independently builds a database of the network's topology, and packets (datagrams) are forwarded, based on the computed ideal path, through the network to the destination.
Term
administrative distance
Definition
In Cisco routers, a means for one router to choose between multiple routes to reach the same subnet when those routes were learned by different routing protocols. The lower the _____, the better the source of the routing information.
Term
metric
Definition
A unit of measure used by routing protocol algorithms to determine the best route for traffic to use to reach a particular destination.
Term
VLSM (Acronym)
Definition
variable-length subnet masking
Term
variable-length subnet masking
Definition
The capability to specify a different subnet mask for the same Class A, B, or C network number on different subnets. ____ can help optimize available address space.
Term
IGP (acronym)
Definition
Interior Gateway Protocol
Term
Interior Gateway Protocol
Definition
A routing protocol that was designed and intended for use inside a single autonomous system.
Term
EGP (acronym)
Definition
Exterior Gateway Protocol
Term
Exterior Gateway Protocol
Definition
A routing protocol that was designed and intended for use between different autonomous systems.
Term
AS (acronym)
Definition
Autonomous System
Term
Autonomous System
Definition
An internetwork in the administrative control of one organization, company, or governmental agency, inside which that organization typically runs an Interior Gateway Protocol (IGP).
Term
BGP (acronym)
Definition
Border Gateway Protocol
Term
Border Gateway Protocol
Definition
A protocol that is used to exchange routes between routers in different autonomous systems. It is an EGP
Term
balanced hybrid
Definition
A term that refers to a general type of routing protocol algorithm, the other two being distance vector and link state. The Enhanced Interior Gateway Routing Protocol (EIGRP) is the only routing protocol that Cisco classifies as using a ______ algorithm.
Term
classful routing protocol
Definition
Does not transmit the mask information along with the subnet number, and therefore must consider Class A, B, and C network boundaries and perform autosummarization at those boundaries. Does not support VLSM.
Term
classless routing protocol
Definition
An inherent characteristic of a routing protocol, specifically that the routing protocol does send subnet masks in its routing updates, thereby removing any need to make assumptions about the addresses in a particular subnet or network, making it able to support VLSM and manual route summarization.
Term
convergence
Definition
The time required for routing protocols to react to changes in the network, removing bad routes and adding new, better routes so that the current best routes are in all the routers’ routing tables.
Term
distance vector
Definition
The logic behind the behavior of some interior routing protocols, such as RIP. ______ routing algorithms call for each router to send its entire routing table in each update, but only to its neighbors. ______ routing algorithms can be prone to routing loops but are computationally simpler than linkstate routing algorithms.
Term
link-state
Definition
A classification of the underlying algorithm used in some routing protocols. ______ protocols build a detailed database that lists links (subnets) and their state (up, down), from which the best routes can then be calculated.
Term
routing update
Definition
A generic reference to any routing protocol’s messages in which it sends routing information to a neighbor.
Supporting users have an ad free experience!