Dynamic Routing Protocol Flashcards
Used for routing within an Autonomous System (AS) - IGP
RIP/EIGRP/OSPF/IS-IS
Used for routing between Autonomous Systems - EGP
BGP
Types of Distance Vector Routing Protocols
RIPv1&2
EIGRP/IGRP
Types of Link State Protocols
OSPF & IS-IS
What is a link state routing protocol ?
Uses link-state information received from routers to create topology map/ select best path to all destination networks in the topology
Does not send subnet mask information in routing updates and cannot support VLSMs and CIDR.
Classful Routing Protocol
Include subnet mask information in routing updates and supports VLSM and CIDR
Classless Routing Protocol
Examples of classless routing protocol
RIPv2,EIGRP,OSPF,IS-IS
Path-Vector Routing Protocol
BGP
Metrics used by RIP
Hop count
Metrics used by EIGRP
Bandwidth, delay, load and reliability.
Metrics used by OSPF
Cost based on cumulative bandwidth
Classless routing protocol
Increased efficiency
Reduced routing entries
Secure
RIPv2
Bounded triggered updates Hello keepalive mechanism Maintains a topology table Rapid convergence Multiple network layer protocol support
EIGRP
Uses accumulated costs along each path, from source to destination
Dijkstra’s Algorithm
Advantages of Link-State Protocols
Faster convergence
Each router builds its own topological map of the network
Disadvantages of LSP
More memory requirements
More CPU processing requirements
Affects bandwidth during LCP flooding.
What loop prevention technique is implemented by distance vector routing protocols?
Split horizon
What are OSPF Hello packets for ?
They are used to maintain neighbor relationships
They are used for dynamic neighbor discovery.
What are two characteristics of link-state protocols compared to distance vector protocols?
require a lot of hardware resources
compute their own knowledge of the network topology.
Which routing protocol is designed to use areas to scale large hierarchical networks?
OSPF
