Dynamic Routing Protocols

Question 1

What 2 types of Routing Protocols make up IGP?

Answer 1

Distance Vector Routing Protocol and Link State Routing Protocol

Question 2

What 2 protocols make up Distance Vector Routing Protocols?

Answer 2

RIP(v2) and EIGRP

Question 3

What 2 protocols make up Link State Routing Protocols?

Answer 3

OSPF & ISIS

Question 4

What type of Routing Protocol makes up EGP?

Answer 4

Path Vector Routing Protocol

Question 5

What protocol makes up Path Vector Routing Protocol?

Answer 5

BGP

Question 6

What is IGP used for?

Answer 6

Internal Routing within an organization

Question 7

What EGP used for?

Answer 7

Routing between organizations over the internet

Question 8

What is one of the main functions of Distance Vector Routing?

Answer 8

It is a dynamic routing algorithm in which each router computes distance between itself and each possible destination

Question 9

What is convergence?

Answer 9

Convergence is when all routing protocol-specific information has been distributed to all routers participating in the routing protocol process.

Question 10

What is Link State Routing Protocol?

Answer 10

It is a dynamic routing algorithm in which each router shares knowledge of its neighbors with every other router in the network.

Question 11

What metric does OSPF use?

Answer 11

Cost

Question 12

What does the cost metric do?

Answer 12

It uses bandwidth of the interface links to determine the best path for routing

Question 13

What does the hop count metric do?

Answer 13

It calculates best path based on the number of hops

Question 14

What metric does EIGRP use?

Answer 14

It uses cost and delay of links to calculate the metric

Question 15

What is the maximum number of hops RIP uses by default?

Answer 15

15

Question 16

What is the Administrative Distance of a Static Route

Answer 16

1

Question 17

What is the Administrative Distance of a Connected Route?

Answer 17

0

Question 18

What is the Administrative Distance of External BGP?

Answer 18

20

Question 19

What is the Administrative Distance of EIGRP?

Answer 19

90

Question 20

What is the Administrative Distance of OSPF?

Answer 20

110

Question 21

What is the Administrative Distance of IS-IS?

Answer 21

115

Question 22

What is the Administrative Distance of RIP?

Answer 22

120

Question 23

What is a loopback interface?

Answer 23

It allows you to assign an IP Address to a Layer 3 device which is not tied to a physical interface

Question 24

What is a default Route Injection?

Answer 24

It allows you to configure one default route on an outbound Layer 3 device and then advertise that static route via whichever routing protocol you’re using so that other L3 devices learn about it automatically

Question 25

How many paths will RIP perform ECMP for?

Answer 25

4 by default

Question 26

Does RIPv1 support VLSM?

Answer 26

No

Question 27

Does RIPv2 use Broadcast or Multicast?

Answer 27

Multicast

Question 28

What is a Hello packet?

Answer 28

A Hello packet is sent out and listened for when a routing protocol is enabled on an interface. It tells other routers to start forming adjacencies

Question 29

What is a DBD Packet?

Answer 29

A DBD Packet is OSPF specific. It tells adjacent routers about the networks they know about

Question 30

What is an LSR?

Answer 30

It's a Link State Request. If a router is missing information about any of the networks received in a DBD packet, it will the neighbor an LSR

Question 31

What is an LSA?

Answer 31

It's a Link State Advertisement. This is a routing update that happens after a router sends an LSR

Question 32

What is an LSU?

Answer 32

Link State Update. This contains a list of Link State Updates that will be used during an upcoming flood

Question 33

What is LSAck?

Answer 33

It's an acknowledgement that a router has received an LSA. If routers don't an acknowledgement after sending a packet, they will resend it

Question 34

How many Process ID's are normally configured in an OSPF network?

Answer 34

1

Question 35

Convert 255.255.255.0 into a Wildcard Mask

Answer 35

0.0.0.255

Question 36

Convert 255.0.0.0 into a Wildcard Mask

Answer 36

0.255.255.255

Question 37

Convert 255.255.0.0 into a Wildcard Mask

Answer 37

0.0.255.255

Question 38

What command will show OSPF router adjacencies formed?

Answer 38

show ip ospf neighbors

Question 39

What command will show the interfaces that OSPF is enabled on?

Answer 39

show ip ospf int brief

Question 40

What are the commands to configure a passive interface on an OSPF router?

Answer 40

router ospf 1 | passive-interface {interface}

Question 41

What are the commands to enter a default route injection into OSPF?

Answer 41

ip route 0.0.0.0 0.0.0.0 {ip-address} router ospf 1 default-information originate

Question 42

What is the default priority on a router (as it relates to DR and BDR)?

Answer 42

1