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IP Engineering > Week 2: IP Control/Helper Protocols > Flashcards

Week 2: IP Control/Helper Protocols Flashcards

1
Q

What are the two levels required by a router to deliver a packet?

A 
Logical Address (IP Address)
Physical (MAC Address)
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2
Q

What does Address Resolution Protocol (ARP) do?

A

Performs mappings

Confined to single hop LAN

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3
Q

How many bits long is the Hardware Type in an ARP Packet?

A

16 bits

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4
Q

How many bits long is the Protocol Type in an ARP Packet?

A

16 bits

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5
Q

How many bits long is the Hardware Length field in an ARP Packet?

A

8 bits

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6
Q

How many bits long is the Protocol Length field in an ARP Packet?

A

8 bits

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7
Q

How many bits long is the Operation Request/Reply field in an ARP Packet?

A

16 bits

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8
Q

An ARP Request is what?

A

A Broadcast

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9
Q

An ARP Reply is what?

A

A Unicast

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10
Q

ICMP is used in which layer for what?

A

Layer 3 for error reporting and making simple queries

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11
Q

ICMP was designed to compensate for what shortcoming?

A

The unreliability of the IP protocol

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12
Q

Does ICMP correct errors?

A

No, it simply report them

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13
Q

When is no ICMP error message generated?

A

ICMP error messages aren’t generated for Broadcast and Multicast packets

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14
Q

What protocol carries/encapsulates ICMP?

A

ICMP is carried by IP

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15
Q

What are the two types of ICMP Messages?

A

Error-Reporting Messages

Query Messages

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16
Q

What are Error-Reporting ICMP Messages?

A

Report problems that a router or a host (Destination) may encounter

17
Q

What are Query ICMP Messages?

A

Get specific information from a router or another host

18
Q

What are the 5 types of ICMP Error Reporting Messages?

A 
3 - Destination Unreachable
4 - Source Quench
11 - Time Exceeded
12 - Parameter Problem
5 - Redirection
19
Q

What are the 4 types of ICMP Query Messages?

A

8 or 0 - Echo Request or Reply
12 or 14 - Timestamp Request or Reply
17 or 18 - Address Mask Request or Reply
10 or 9 - Router Solicitation or Advertisement

20
Q

What are two of the more important ICMP Error Messages?

A

3 - Destination Unreachable

11 - Time Exceeded

IP Engineering (15 decks)

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