Layer 3/Network

Question 1

ND protocol

Answer 1

Neighbor Discovery - IPv6 only

Question 2

SLAAC

Answer 2

Stateless Address Autoconfiguration - IPv6 only similar to DHCP in IPv4

Question 3

Dual Stack

Answer 3

Device is “Dual Stack” when it can process both IPv4 and IPv6 addresses simultaneously.

Question 4

Convergence

Answer 4

process whereby routers running dynamic routing algorithms agree on the network topology.

Question 5

RIP

Answer 5

Routing Information Protocol -

Question 6

EIGRP

Answer 6

Enhanced Interior Gateway Routing Protocol

Question 7

OSPF

Answer 7

Open Shortest Path First- link state protocol for network discovery. Designed to support classless addressing.

Tagged as protocol 89 in the IP datagram’s Protocol Field

Question 8

BGP

Answer 8

Border Gateway Protocol - type of exterior gateway protocol for communications between routers in separate autonomous systems.

Works over TCP/179

Question 9

AD

Answer 9

administrative distance- value that router places on different routing protocols for comparing trustworthiness.
Smaller value = greater trust

Question 10

CIDR

Answer 10

Classless Inter-Domain Routing a.k.a. Supernetting

Question 11

VLSM

Answer 11

variable length subnet masking - classless addressing technique. Allows different length netmasks to be used within the same IP network

Question 12

Command to show active routing table

Answer 12

‘show route’, ‘show ip route’

Question 13

Command to show routing table

Answer 13

‘route print’

Question 14

Command used to test entire path between nodes, output shows hops, ip address, time taken for response.

Answer 14

‘traceroute’ -Linux/Cisco
‘tracert’ - Windows

Question 15

STP

Answer 15

Spanning Tree Protocol