Annex C16 Advanced Routing

Question 0

Interior Gateway Protocols (IGP)

Answer 0

two broad types:

Static

Dynamic

Question 1

Autonomous System (AS)

Answer 1

Group of routers and their data networks that share a common routing policy and administration

Interior routing protocols are used to enable comm between different networks; they establish the common routing policy that defines the AS.

Moreover, exterior routing protocols are used to connect together different AS and ensure traffic is able to enter and exit AS

Question 2

Exterior Gateway Protocols (EGP)

Answer 2

Exterior Gateway Protocols are used to connect together different autonomous systems and ensure traffic is able to enter and exit the AS

Question 3

Static Routing

Answer 3

Configure by the network administrator and show destination network, its subnet, and next hop. Color coded red, blue, green

IP route: Network (red) Subnet Mask (blue) Next Hop (green)

Advantages: More secure, does not use bandwidth for overhead/routing table, always override dynamic route

Disadvantages: very configuration intensive

Question 4

Dynamic Routing

Answer 4

Three routing types: distance vector, link state, enhanced distance vector

Distance Vector: Use only hop count to determine the shortest way to route a packet

Link State: Routing table uses hop count and cost (bandwidth) to determine best route

Enhanced Distance Vector: Combine best parts of link state and distance vector protocols

Question 5

Convergence

Answer 5

Process of developing the topology of a network

Anytime any change is made to the network like adding networks etc

Whenever the topology of the network changes, routers must adjust for hte changes to alter their understanding of the topology of the network IOT ensure packets are routed down the right path.

Question 6

Factors affecting convergence

Answer 6

Event driven convergence: changes to network (ie adding networks, adding/removing routers, loss of comm w/ router etc)

Timed Updates: occur when time period has elapsed. Can waste bandwidth and increase network overhead because the updates may be unnecessary.

Question 7

Enhanced Distance Vector Routing Protocol

Answer 7

Combine best parts of link state and distance vector protocols

Question 8

Most common Enhanced Distance Vector Routing Protocol employed by USMC PSN

Answer 8

EIGRP

Data planners can configure metrics to shape the flow of the traffic through the network
-metrics include: bandwidth, delay, reliability, load

Question 9

Most common Exterior Gateway Protocol used to connect USMC PSN

Answer 9

Border Gateway Protocol 4.0 (BGP) to connect our deployed networks to the DISN.