Dynamic Routing Protocols Flashcards
What is a dynamic routing protocol?
A protocol that automatically learns and updates routing information in a network.
What are the three main types of dynamic routing protocols?
Distance vector. link.state. and path.vector.
What is the primary difference between distance vector and link.state routing?
Distance vector protocols determine the best path based on hop count. while link.state protocols build a complete network topology.
Name three common distance vector routing protocols.
RIP. EIGRP. and IGRP.
Name two common link.state routing protocols.
OSPF and IS.IS.
What does RIP stand for. and what metric does it use?
Routing Information Protocol
What is the maximum hop count in RIP before a route is considered unreachable?
15 hops.
What is the main disadvantage of RIP?
It does not scale well due to its 15.hop limit and slow convergence time.
How often does RIP send updates?
Every 30 seconds.
What is the administrative distance of RIP?
120
What is the main advantage of EIGRP over RIP?
EIGRP is faster. more scalable. and supports unequal.cost load balancing.
What metric does EIGRP use?
A composite metric based on bandwidth. delay. reliability. and load.
What is the administrative distance of EIGRP for internal routes?
90
What is a key feature of OSPF that makes it different from distance vector protocols?
OSPF uses the Dijkstra algorithm to build a complete topology of the network.
What are OSPF areas used for?
To improve scalability and reduce overhead in large networks.
What is the administrative distance of OSPF?
110
What type of routing protocol is IS.IS?
A link.state routing protocol.
What is the primary advantage of IS.IS over OSPF?
IS.IS is more flexible in large networks and better suited for ISPs.
What is a path.vector routing protocol. and which protocol is an example?
A protocol that tracks the full path of a route rather than just the next hop
What is the main purpose of BGP?
To exchange routing information between autonomous systems (AS) on the Internet.
What protocol does BGP use for transport?
TCP. specifically port 179.
What is the administrative distance of BGP?
External BGP (eBGP) is 20. and Internal BGP (iBGP) is 200.
What is route summarization. and why is it useful?
A method of combining multiple routes into a single advertisement to reduce routing table size and improve efficiency.
What is convergence in dynamic routing?
The process where all routers agree on the best paths after a topology change.
