Routing Protocols (obj 2.1) Flashcards
(17 cards)
What are the two main types of dynamic routing protocols?
Internal and External
Internal protocols operate within an autonomous system, while external protocols operate between autonomous systems.
What does IGP stand for?
Interior Gateway Protocol
IGP operates within an autonomous system.
What does EGP stand for?
Exterior Gateway Protocol
EGP operates between autonomous systems on exterior networks.
What is the primary characteristic of Distance Vector routing protocols?
Sends full routing table to directly connected routers at regular intervals
This method can lead to slow convergence times.
Define convergence time in the context of routing protocols.
Time for all routers to update routing tables in response to topology changes
Slow convergence can be a drawback of some routing protocols.
What is a hold-down timer?
Prevents updates for a specific period of time and speeds up convergence
It is used to stabilize routing tables during changes.
What is hop count?
Number of routers from the source router to the destination network
It is used as a metric for routing decisions.
What is a key feature of Link State routing protocols?
Requires all routers to know about the paths that all other routers can reach in the network
This results in faster convergence times compared to distance vector protocols.
What characterizes Hybrid routing protocols?
Combines aspects of both distance vector and link state protocols
This allows for more flexible routing decisions.
What is RIP and what are its main features?
Routing Information Protocol; an interior gateway protocol that uses distance vector and hop count
It is the oldest dynamic routing protocol with a maximum of 15 hops and updates every 30 seconds.
What does OSPF stand for?
Open Shortest Path First
OSPF uses link state and cost for routing decisions.
How does OSPF determine cost for routing decisions?
Based on link speed
This allows OSPF to make efficient routing decisions.
What is IS-IS and how is it related to OSPF?
Intermediate System to Intermediate System; an interior gateway protocol similar to OSPF
It also uses cost based on link speed for routing decisions.
What does EIGRP stand for?
Enhanced Interior Gateway Routing Protocol
It is an advanced distance vector protocol that combines features of both distance vector and link state.
What metrics does EIGRP use for routing decisions?
Bandwidth, delay, and cost
These metrics allow for more nuanced routing decisions.
What is BGP and its role in networking?
Border Gateway Protocol; an external gateway protocol and backbone protocol of the internet
BGP uses path vector and autonomous system hops for routing decisions.
True or False: BGP has a fast convergence time.
False
BGP is known for its slow convergence time.
