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CISA 1220 Cisco Routing > Chapter 7: Routing Dynamically > Flashcards

Chapter 7: Routing Dynamically Flashcards

1
Q

What is Dynamic Routing protocol

7.1.1.3

A

Routing Protocols are used to exchange routing and route information between routers. Its purpose is to discover remote networks, maintain up-to-date routing info, choosing the best path to destination networks, and discover new best path if current path is disrupted.

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2
Q

What are the three (3) components Dynamic Routing Protocols

7.1.3.1

A
  1. Data structures – table/DBs kept in RAM
  2. Routing messages – used to discover neighbors & exchange information to maintain accurate information about the network.
  3. Algorithm – to facilitate best path determination.
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3
Q

What are the three (3) advantages of dynamic routing protocols
7.1.2.4

A
  1. Automatic! Little maintenance & administration overhead required.
  2. Calculate best path
  3. Help admins manage static routes
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4
Q

What are four (4) disadvantages of dynamic routing protocols

A
  1. CPU & memory usage can be high
  2. Network bandwidth usage
  3. Less secure – router conversations can be intercepted
  4. Experienced administrator required
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5
Q

What does RIP stand for

7.1.1.1

A

Routing Information Protocol (RIP)

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6
Q

What does OSPF stand for

7.1.1.1

A

Open Shortest Path First (OSPF)

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7
Q

What does EIGRP

7.1.1.1

A

Enhanced Interior Gateway Routing Protocol

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8
Q

What is BGP

7.1.1.1

A

Border Gateway Protocol (BGP)

used between Internet service providers

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9
Q

What area of data structure, EIGRP creates and maintains?

7.1.1.4

A

Topology table
Neighbor Table
Best path Table

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10
Q

In the area of of routing protocol messages, EIGRP use what?

7.1.1.4

A 
Acknowledgments
Queries
Updates
REplies
Hello
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11
Q

To identify the best route, EIGRP uses this algorithm:

7.1.1.4

A

DUAL

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12
Q

What is the advantages of static Routing

7.1.2.1

A

Networks can use both static and dynamic routing. Static routing is easier to use in smaller, stable networks and are great for routing to and from stub networks, they don’t use any CPU or bandwidth, and finally they are more secure because they don’t share routing information.

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13
Q

What are the three (3) disadvantages of Static Routing

7.1.2.1

A
  1. They are not easy to implement in a large network.
  2. Managing the static configurations can become time consuming.
  3. If a link fails, a static route cannot reroute traffic.
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14
Q

What is coverage?

7.1.3.5

A

converged when all routers have complete and accurate information about the entire network,

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15
Q

What is Convergence

A

he routers share information with each other, but must independently calculate the impacts of the topology change on their own routes.

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16
Q

What is IS-IS?

A

Intermediate System to Intermediate System (IS-IS)

17
Q

What is Distance vectoring Routing Protocols

A

Distance vector protocol use limited pointers to distant networks

18
Q

What is Link-State Routing Protocol

A

Link-state protocols have complete knowledge of the entire network and all routers have the same map.

19
Q

What is Classful Routing Protocols

7.1.4.5

A

Classful routing protocols do not send subnet masks in their routing updates. Only RIPv1 and IGRP are classful.
• Does not support VLSM & CIDR
• Create problems with discontinuous networks

20
Q

What is Classless Routing Protocols

7.1.4.6

A

Classless routing protocols include subnet masks in their routing updates.
• RIPv2, EIGRP, OSPF, and IS-IS
• Support for VLSM & CIDR
• IPv6 routing protocols

21
Q

What is Routing Protocol Metrics

A

The metric is the value assigned by the routing protocol to measure routes. The best path is based on the route with the lowest cost. Lower the better.

22
Q

What is Distance Vector Protocols

7.2.1.1

A

DV protocols share updates between neighbours and are not away of the network topology. They send periodic broadcast updates even if topology has not changed. Updates use bandwidth and resource. RIPv2 & EIGRP use multicasts. EIGRP uses triggered updates only.

23
Q

What does RIP use for there algorithm

7.2.1.2

A

Bellman-Ford

24
Q

What does IGRP and EIGRP use for there algorithm

7.2.1.2

A

Diffusing Update Algorithm (DUAL)

25
Q

Which Protocol send hello packets ?

7.2.2.3

26
Q

Which Protocol supports Version 2 and classes routing ?

7.2.2.3

27
Q

Which protocol has a max of 255 ?

7.2.2.3

28
Q

Which protocol has a max of 15 ?

7.2.2.3

29
Q

Which protocol forms neighbor adjacencies ?

7.2.2.3

30
Q

Which protocol broadcasts routine updates 255.255.255.255.255
7.2.2.3

31
Q

Which protocol Multicast bounded, trigger updates to 224.0.0.10
7.2.2.3

32
Q

Which protocol uses administrative distance of 120

33
Q

Which protocol send routing updates every 30 sec?

7.2.2.3

34
Q

Which protocol uses DUAL algorithm?

7.2.2.3

CISA 1220 Cisco Routing (5 decks)

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