Routing

Question 1

Routing Table

Answer 1

• Helps determine which route entry is the best fit for the network

Question 2

Directly Connected Route

Answer 2

Learned by physical connection between routers

Question 3

Static Route

Answer 3

Manually configured by an administrator

Question 4

Dynamic Routing

Answer 4

Learned by exchanging information between routers

Question 5

Poison Reverse

Answer 5

Causes a route received on one interface to be advertised back out the same interface with a metric considered to be infinite

Question 6

Interior Gateway Protocol (IGP)

Answer 6

Operates within an autonomous system

Question 7

Exterior Gateway Protocol (EGP)

Answer 7

Operate between autonomous systems

Question 8

Distance Vector

Answer 8

• Sends full copy of routing table to its directly-connected neighbors at regular intervals

Question 9

Hold-down Timer

Answer 9

Prevents updates for a specific period of time and speeds up convergence

Question 10

Link State

Answer 10

Requires all routers to know about the paths that all other routers can reach in the network

Question 11

Routing Information Protocol (RIP)

Answer 11

A distance vector protocol that uses hop count (maximum hops of 15; 16 is infinite)

Question 12

Open Shortest Path First (OSPF)

Answer 12

A link state protocol that uses cost

Question 13

Intermediate System to Intermediate System (IS-IS)

Answer 13

A link state protocol that uses cost and functions like OSPF protocol, but not as widely popular

Question 14

Network Address Translation (NAT)

Answer 14

Used to conserve the limited supply of IPv4 addresses

Question 15

Dynamic NAT(DNAT)

Answer 15

Automatically assigns and IP address from a pool and gives a one-to-one translation

Question 16

Static NAT(SNAT)

Answer 16

Manually assigns an IP address and give a one-to-one translation

Question 17

Port Address Translation

Answer 17

Sharing of one public IP by multiple private IP addresses which gives a many-to-one translation

Question 18

Multicast Routing

Answer 18

• Multicast sends traffic to a Class D IP address, known as a multicast group

Question 19

Internet Group Management Protocol (IGMP)

Answer 19

Lets routers know which interfaces have multicast receivers and allows clients to join a multicast group

Question 20

Protocol Independent Multicast (PIM)

Answer 20

Routes multicast traffic between routers and forms a multicast distribution tree

Question 21

PIM Dense Mode (PIM-DIM)

Answer 21

Uses periodic flood and prune behavior to form optimal distribution tree

Question 22

PIM Spars Mode (PIM-SM)

Answer 22

Uses a shared distribution tree and creates an optimal distribution tree through shortest path tree (SPT)