Routing

Question 1

Routing Table

Answer 1

Tells the router exactly where to send the packets

Question 2

Command to see Routing Table

Answer 2

netstat -r

Question 3

Metric

Answer 3

Cost of using a route

Question 4

DOCSIS

Answer 4

Data over cable Service Interface Specification

Question 5

ATM

Answer 5

Asynchronous Transfer mode

Question 6

NAT

Answer 6

Network Address Translation

Question 7

NAT Definition

Answer 7

Hides the ip addresses of computers on the the LAN but enable them to connect to the broader internet

Question 8

PAT

Answer 8

Post Address Translation

Question 9

PAT Definition

Answer 9

Uses port numbers to map traffic from specific machines in the network

Question 10

SNAT

Answer 10

Static NAT maps a single routable IP address to a single machine.

Question 11

DNAT

Answer 11

Dynamic NAT many computers can share a pool of routable IP addresses that number fewer than the computers

Question 12

Hop

Answer 12

each time a packet goes through a router

Question 13

Hop count

Answer 13

metric value for the number of routers a packet will pass through on its way to its destination network.

Question 14

MTU

Answer 14

Maximum Transmission Unit, determines the largest frame a particular technology can handle

Question 15

Distance Vector Routing

Answer 15

Uses total cost counting, and calculate the total cost to get to a particular network ID and compare that cost to the total cost of all the other routes to get to the same location.

Question 16

RIPv1

Answer 16

Routing Information Protocol A form of distance vector routing.

Maxiumum Hop Count: 15
Update interval: 30 seconds

Question 17

VLSM

Answer 17

Variable Length Subnet Masking, where networks connected through the router use different subnets masks.

Question 18

RIPv2

Answer 18

VLSM and authentication are both added.

Question 19

ASN

Answer 19

Autonomous system number

Question 20

EGP

Answer 20

Exterior Gateway Protocol

Question 21

BGP

Answer 21

Border Gateway Protocol, connects all Autonomous systems, Current version is BGP-4

Question 22

Route Aggregation

Answer 22

A way to simplify routing tables into manageable levels

Question 23

Link State dynamic Routing protocol

Answer 23

announce and forward individual route changes as they appeared

Question 24

2 Kinds of Link State

Answer 24

OSPF and IS-IS

Question 25

OSPF

Answer 25

Open Shortest Path First, used inside Autonomous systems, when first connected will send Hello packets to see other OSPF devices.

Question 26

LSA

Answer 26

Link State Advertisement, information about routers and network that are sourced by each router and are flooded from router to router in each OSPF area

Question 27

IS-IS

Answer 27

Intermediate system to Intermediate System, uses concept of areas and send only updates to routing tables. Link State Dynamic routing protocol that supporting IPv6 from start.

Question 28

EIGRP

Answer 28

Enhanced Interior Gateway Routing Protocol, proprietary to cisco and is an Advanced distance vector protocol

Question 29

Route Redistribution

Answer 29

When a router takes routes it has learned by one method and announces these routes over another protocol.

Question 30

Yost Cable/Rollover cable

Answer 30

The serial cable you can connect to a cisco router using

Question 31

NMS

Answer 31

Network Management Software

Question 32

Traceroute tool

Answer 32

Command: tracert Records a route between any two hosts on a network and returns information about every router between them.