Term
| What are routing protocols and/or what do they do? |
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Definition
| They are used to facilitate the exchange of routing information between routers. Routing protocols allows routers to dynamically share info about remote networks. |
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Term
| What is one of the primary benefits of using a dynamic routing protocol? |
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Definition
| Routers exchange routing info whenever there is a topology change in the network. |
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Term
| Do dynamic routing protocols require more or less administrative overhead as compared to static routing? |
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Definition
| Less adminstrative overhead |
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Term
| What is the expense of using dynamic routing protocols? |
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Definition
| Deidcating part of a router's resources for protocol operation. |
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Term
Definition - A set of processes, algorithms, and messages that are used to exchange routing info and populate the routing table with the choice of best paths.
This is the definition of what networking process? |
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Definition
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Term
| What are the purposes of a routing protocol? |
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Definition
-Discovery of remote networks
-Maintaining up-to-date routing info
-Choosing the best path
-Ability to find a new best path if the current path is no longer available. |
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Term
| List and define the three components of routing protocols? |
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Definition
-Data structures
-Algorithms
-Routing protocol messages |
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Term
| What are the four general operations of a dynamic routing protocol? |
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Definition
-The router sends and receives routing messages
-The router shares routing messages and routing info.
-Router exchanges routing info
-Router detects a topology change and can advertise to other routers. |
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Term
| What are some distance vector protocols? |
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Definition
| RIPv1, RIPv2, IGRP, and EIGRP |
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Term
| What are some link state protocols? |
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Definition
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Term
| What is the exterior routing protocol listed? |
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Definition
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Term
| What is Autonomous System? |
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Definition
| Otherwise known as a routing domain. It is a collection of routers under common adminstration. |
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Term
| What are Interior Gateway Protocols used for? |
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Definition
| They are used for intra-autonomous system routing-routing inside an autonomous systems. |
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Term
| What are Exterior Gateway Protocols used for? |
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Definition
| They are used for inter-autonomous system routing-routing between autonomous systems. |
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Term
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Definition
| That the routes are advertised as vectors of distance and direction. Distance vector protocols typically use the Bellman-Ford algorithm for best path route determination. |
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Term
| Define distance and direction? |
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Definition
| Distance is defined in terms of metrics such as hop count and direction is simply the next-hop router or exit interface. |
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Term
| Where does a distance vector receives it information from? |
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Definition
| Receives its info from its neighbors. |
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Term
| Do distance vector protocols have a map of the entire network? |
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Definition
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Term
| Where do distance vector protocols work best? |
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Definition
| the network is simple and flat does not require a special hierarchical design. |
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Term
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Definition
| When intermediate devices all have the same consistent network topology in their routing tables. |
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Term
| When are updates sent in a link-state network? |
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Definition
| When there are changes in the topology. |
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Term
| What are the best situations to use a link-state protocol? |
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Definition
-Large networks
-Fast convergence of the network is needed |
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Term
| What do classful routing protocols not send in their updates? |
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Definition
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Term
| What is the situation where you can not use a classful routing protocol? |
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Definition
| Classful routing protocols cannot be used when a network is subnetted using more than one subnet mask. (VLSM) |
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Term
| What are two classful routing protocols? |
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Definition
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Term
| What do classless routing protocols include in their updates? |
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Definition
| Subnet mask with the network address in routing updates. |
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Term
| What are the classless routing protocols? |
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Definition
| RIPv2, EIGRP, OSPF, IS-IS, and BGP |
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Term
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Definition
| When all router's routing tables are at a state of consistency. |
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Term
| What is convergence time? |
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Definition
| The time it takes routers to share info, calculate best paths, and update their routing tables. |
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Term
| Which two protocols are slow to converge? |
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Definition
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Term
| Which two protocols are faster to converge? |
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Definition
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Term
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Definition
| It is a value used by the routing protocols to assign costs to reach remote networks. |
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Term
| What is the metric used for? |
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Definition
| To determine which path is most preferable when there are multiple paths to the same remote network. |
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Term
| What is the metric for RIP? |
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Definition
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Term
| What is the metric for EIGRP? |
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Definition
| Combination of bandwidth and delay. |
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Term
| What is the metric for OSPF? |
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Definition
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Term
| What does hop count refer to? |
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Definition
| The number of routes a packet must cross to each destination network. |
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Term
| Can metrics from one routing protocol be compared to another routing protocol's metric? |
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Definition
| The metric used by one routing protocol is not comparable to the metric used by another routing protocol. |
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Term
| List and explain each routing protocol and the metric it uses? |
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Definition
RIP - Hop Count
IGRP/EIGRP - Bandwidth/Delay/Reliability/Load
IS-IS/OSPF - Cost-Best path is chosen by the route with lowest cost. |
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Term
| What is the process used to forward packets when 2 or more paths have equal costs? |
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Definition
| Instead the router "load balances" between these equal cost paths. |
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Term
| Where can you look to determine if load balancing is being used? |
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Definition
| Check the routing table. Load balancing is in effect if two or more routes are associated with the same destination. |
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Term
| What are the possible values for Adminstrative distance? |
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Definition
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Term
| What is the best value for adminstrative distance? |
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Definition
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Term
| What type of route has the lowest possible adminstrative distnace? |
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Definition
| directly connected network |
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Term
| What does an adminstrative distance of 255 mean? |
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Definition
| The router will not believe the source of that route. |
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Term
| Where can you find the adminstrative distance in the show ip route? |
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Definition
| The AD value is the first value in the brackets for a routing table entry. |
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Term
| How does a router choose the best path if two routing protocols are being used? |
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Definition
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Term
| What are the two commands in which you can determine the AD is? |
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Definition
R1#show ip route
R1#show ip rip database |
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Term
| What is the default AD for a static route? |
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Definition
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Term
| Can you change the AD of a directly connected network? |
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Definition
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