ICMP Packet Type

Description

Echo request

Determines whether an IP node (a host or

 

a router) is available on the network.

Echo reply

Replies to an ICMP echo request.

Destination

Informs the host that a datagram cannot

unreachable

be delivered.

Source quench

Informs the host to lower the rate at which

 

it sends datagrams because of

 

congestion.

Redirect

Informs the host of a preferred route.

Time exceeded

Indicates that the Time-to-Live (TTL) of an

 

IP datagram has expired.

Parameter

Informs that host that there is a problem in

Problem

one the ICMP parameter.

Timestamp

Information that is from the ICMP data

Request

packet.

Information

Information that is from the ICMP data

Request

packet.

Information Reply

Information that is from the ICMP data

 

packet.

IGMP Types

: This IP protocol is used to establish host memberships in particular

 

 

multicast groups on a single network. The mechanisms of the

 

 

protocol allow a host to inform its local router, using Host

 

 

Membership Reports.

 

 

 

 

 

 

 

Host Membership

Information that is from the IGMP data

 

 

Report

packet.

 

 

Host Membership

Information that is from the IGMP data

 

 

Query

packet.

 

 

Leave Host

Information that is from the ICMP data

 

 

Message

packet.

Source IP

: This parameter allows you to specify workstation(s) generating the

 

 

data packets. Users can either set a single IP address or set a range

 

 

of IP addresses.

 

Destination IP

: This parameter lets you specify the set of workstations that receive

 

 

the data packets. Users can either set a single IP address or set a

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