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Networking > Routing > Flashcards

Routing Flashcards

1
Q

What is a Router?

A

is a piece of software or hardware that forwards packets based on their destination IP address.

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2
Q

What is a Routing Table?

A

Every router has one that ell the router exactly where to send packets. Each row in the table defines a single route.

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3
Q

How many components does a routing table have?

What are they

A

4

Destination LAN
Subnet Mask
Gateway
Interface

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4
Q

What is a Metric in Router?

A

is a relative value that defines the cost of using the route.
If there are multiple routes the lower metric would be used if available.

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5
Q

What is NAT and its meaning?

A

Network Address Translation hides the Ip address of computers on a LAN but still enables those computers to communicate with the broader internet.

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6
Q

What is PAT and its meaning?

A

Port Address Translation uses port numbers tom app traffic from specific machines in the network. This only works from within a network to an external network.

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7
Q

What are the types of Port Forwarding.

A

Static NAT

Dynamic Nat

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8
Q

What is Static NAT?

A

maps single routable IP address to a single machine enable you to access that machine from outside the network

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9
Q

What is Dynamic

A

computers can share a pool of routable IP address.

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10
Q

What are the Type of Routing Protocol

A

Distance Vector
Path Vector
Link State

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11
Q

Name types of Distance Vector

A

RIPv1 & RIPv2, EIGRP

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12
Q

Name type of Path Vector

A

BGP

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13
Q

Name type of Link State

A

OSPF & ISIS

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14
Q

Who does level 1 Routers communicate with

A

Only level 1

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15
Q

Who does level 1/2 Routers communicate with

A

Only level 1/2

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16
Q

What is RIP?
What is the AD for RIP?
What is the protocol used and port

A

A dynamic routing protocol which uses hop counts as a routing metric to find the best path between the source and destination.

AD is 120

UDP port 520

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17
Q

What is the features of RIP?

A
  1. Updates of the network are exchanged periodically
  2. Updates are always broadcast
  3. Full routing tables are sent in updates
  4. 15 hop max. the 16 is unreachable
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18
Q

What is BGP?

A

Exchange routing information for the internet and it’s the protocol used by ISP.

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19
Q

what is link state?

A

allows routers to build a topological map of the network

20
Q

What is distance vector?

A

Sends a full copy of its routing table to its directly attached neighbors

21
Q

What is OSPF?

A

Open Shortest Path First.

A link-state routing protocol that uses metric of cost. Which is based on the link speed between two routers

AD is 110.

Area 0 is backbone

22
Q

What is IS-IS

A

Intermediate System to Intermediate system.

A link-state routing protocol. similar to OSPF. ADD is 115

23
Q

What is EIGRP

A

Enhanced Interior Gateway Routing Protocol

made by CISCO distance veteror is used to automating routing decisions and configurations.

AD 170

24
Q

Meaning of 255 AD?

A

Unreachable

25
Q

What is split horizon?

A

The split-horizon feature prevents a route learned on one interface from being advertised back out of the same interface.

26
Q

What is poison reverse?

A

causes a route received on one interface to be advertised back out of the same interface which a metric consider to be infinite.

27
Q

What is IGRP

A

Interior Gateway Routing Protocol. is a distance vector protocol designed by CISCO.
AD 100

28
Q

What is the AD for directly connected interface?

A

0

29
Q

What is the AD for static route?

A

1

30
Q

What is the AD for ExternalBGP?

A

20

31
Q

What is the AD for Internal EIGRP?

A

90

32
Q

What is the AD for IGRP ?

A

100

33
Q

What is the AD for OSPF?

A

110

34
Q

What is the AD for IS-is?

A

115

35
Q

What is the AD for RIP?

A

120

36
Q

What is the AD for EGP?

A

140

37
Q

What is the AD for ODR?

A

On demand Routing 160

38
Q

What is the AD for External EIGRP?

A

170

39
Q

What is the AD for Internal BGP?

A

200

40
Q

What is the AD for unknown?

A

255

41
Q

Router>

A

User Mode

42
Q

Router#

A

Privileged Mode

43
Q

Router(config)#

A

configuration mode

44
Q

Router(config-if)#

A

Interface level

45
Q

Router(config-router)#

A

routing engine level

46
Q

Router(config-line)#

A

Line level. vey,tty,async

Networking (19 decks)

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