ICMP

What does ICMP stand for?

Internet Control Message Protocol

Internet Communication Management Protocol

Internal Control Message Protocol

Internet Connection Management Protocol

Which ICMP message type is used to indicate that a destination is unreachable?

Type 3

Type 8

Type 11

Type 0

What is the primary purpose of ICMP?

To provide error reporting and diagnostic functions

To transfer files

To establish secure connections

To manage IP addresses

Which ICMP message type is used for an Echo Reply?

Type 0

Type 8

Type 3

Type 11

Which ICMP message type is used by the Traceroute utility?

Type 11

Type 0

Type 3

Type 8

Which field in the ICMP header indicates the type of message being sent?

Type

Code

Checksum

Identifier

What is the function of the ICMP 'Time Exceeded' message?

To indicate that a packet has exceeded its time-to-live (TTL) value

To report a successful ping

To notify that a port is unreachable

To establish a connection

Which ICMP message type is used for an Echo Request?

Type 8

Type 0

Type 3

Type 11

Which ICMP message type is used by Traceroute to identify each hop along the path?

Type 3 (Destination Unreachable)

Type 8 (Echo Request)

Type 11 (Time Exceeded)

Type 5 (Redirect)

The "ping" command typically uses which ICMP message types?

Echo Request (Type 8) and Echo Reply (Type 0)

Destination Unreachable (Type 3)

Source Quench (Type 4)

Timestamp Request (Type 13) and Timestamp Reply (Type 14)

Which statement about ICMP is NOT true?

ICMP messages can be used for diagnostics like "traceroute."

ICMP operates at the network layer (Layer 3) of the OSI model.

ICMP can be used in some Denial-of-Service (DoS) attacks.

ICMP is a connectionless protocol.

What is the role of the "checksum" field in the ICMP header?

To identify the ICMP message type

To ensure data integrity during transmission

To specify the source and destination IP addresses

To define the message payload size

Which ICMP message is used to indicate a redirect for the host to send packets on a more optimal route?

Type 0 (Echo Reply)

Type 3 (Destination Unreachable)

Type 5 (Redirect)

Type 11 (Time Exceeded)

What is the purpose of the ICMP Time Exceeded message (Type 11, Code 1)?

To indicate that a packet's TTL has expired in transit

To notify the source that the packet's fragment reassembly time exceeded

To indicate that a destination host is unreachable

To request an Echo Reply

Which ICMP message type/code is used to indicate that a destination host is administratively prohibited?

Type 3, Code 1

Type 3, Code 9

Type 3, Code 10

Type 3, Code 13

What ICMPv6 message is sent when a node has to notify others of its link-layer address change?

Router Advertisement

Neighbor Solicitation

What ICMPv6 message is sent when a node has to notify others of its link-layer address change?

Router Advertisement

Neighbor Solicitation

Neighbor Advertisement

Redirect

Which ICMP message type is used to inform hosts of network congestion and reduce the rate of transmission?

Type 3, Code 4 (Fragmentation Needed)

Which ICMP message type is used to inform hosts of network congestion and reduce the rate of transmission?

Type 3, Code 4 (Fragmentation Needed)

Type 4 (Source Quench)

Type 11 (Time Exceeded)

Type 12 (Parameter Problem)

What is the primary purpose of an ICMP Parameter Problem message?

To indicate a TTL expiration

To indicate a problem with the header parameters

To redirect packets to a better route

To request an Echo Reply

Which ICMP message type is used for path MTU (Maximum Transmission Unit) discovery?

Echo Request (Type 8)

Which ICMP message type is used for path MTU (Maximum Transmission Unit) discovery?

Echo Request (Type 8)

Packet Too Big (Type 3, Code 0)

Time Exceeded (Type 11)

Mask Request (Type 17)

What is the purpose of the ICMP "Timestamp Request" message?

To report errors during data transfer

To initiate a connection between devices

To measure round-trip time (similar to ping)

To fragment large packets

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