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Network+ > 07 - Routing > Flashcards

07 - Routing Flashcards

1
Q

Router

A
  • Forwards packets based on IP

- works at network layer

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2
Q

Switch that works at more than one layer

A

MLS

- Multi-layer Switch

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3
Q

Layer 3 Switch

A

Handles IP traffic as well (routing)

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4
Q

Routing Table

A

Tells the router exactly where to send packets based on IP

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5
Q

Columns of a routing table

A

Destination LAN IP - defined network ID
Subnet Mask - network ID
Gateway - IP for next hop router
Interface - LAN or WAN

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6
Q

What does 0 mean on routing tables

A

Anything - wildcard

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7
Q

Routing table default route

A

Tells the router what to do with every incoming packet unless another line in the tables gives a route

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8
Q

View routing table windows CLI

A

route print
or
netstat -r

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9
Q

View routing table Linux & Mac CLI

A

netstat -r

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10
Q

routing table metric

A

defines “cost” of using a particular route

- lower values are better

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11
Q

SNAT

A

Static NAT

-

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12
Q

DNAT

A

Dynamic NAT

-

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13
Q

hop

A

Each time a packet goes through a router

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14
Q

Most common criteria for routing metrics

A

hop count -
bandwidth -
delay -
cost -

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15
Q

MTU

A

Maximum Transmission Unit

- The largest frame a particular technology can handle

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16
Q

Convergence

A
  • updating of routing tables for all routers has been completed
  • also called steady state
17
Q

RIP

A

Routing Information Protocol

  • first is RIPv1
  • current is RIPv2
18
Q

AS

A

Autonomous System

  • one or more networks that are governed by a sigle dynamic routing protocol
  • do not use IPs, but use Autonomous System Number (ASN) assigned by IANA
  • 2 16 bit numbers separated by a dot (32 bits total)
  • use either Exterior Gateway Protocol (EGP) or Interior Gateway Protocol (IGP)
19
Q

BGP

A

Border Gateway Protocol

  • hybrid routing protocol
  • uses route aggregation
20
Q

Edge Routers

A

Routers for AS-to-AS communication

21
Q

OSPF

A

Open Shortest Path First

- most commonly used IGP in the world

22
Q

Link State Routing Protocols

A

Instead of updating an entire routing table at regular intervals, routers announce and forward individual route changes as they appear
- two kinds are

Network+ (7 decks)

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