What is the net effect of using ICMP Type 4 messages to attack RFC 1122 compliant hosts?
A.
Hosts will perform a “hard” TCP reset and tear down the connection.
B.
Hosts will reduce the rate at which they inject traffic into the network.
C.
Hosts will redirect packets to the IP address indicated in the ICMP type 4 message.
D.
Hosts will perform a “soft” TCP reset and restart the connection.
E.
Hosts will retransmit the last frame sent prior to receiving the ICMP type 4 message.
Explanation:
The Internet Control Message Protocol (ICMP) has many messages that are identified by a “type” field.
http://www.iana.org/assignments/icmp-parameters
1.1.1 Internet Hosts A host computer, or simply “host, ” is the ultimate consumer of communication services. A host generally executes application programs on behalf of user(s), employing network and/or Internet communication services in support of this function. An Internet host corresponds to the concept of an “End-System” used in the OSI protocol suite [INTRO:13]. An Internet communication system consists of interconnected packet networks supporting communication among host computers using the Internet protocols. The networks are interconnected using packet-switching computers called “gateways” or “IP routers” by the Internet community, and “Intermediate Systems” by the OSI world [INTRO:13]. The RFC “Requirements for Internet Gateways” [INTRO:2] contains the official specifications for Internet gateways. That RFC together with
http://www.faqs.org/rfcs/rfc1122.htmlThe Source Quench is an Internet Control Message Protocol message which requests the sender to decrease the traffic rate of messages to a router or host. This message may be generated if the router or host does not have sufficient buffer space to process the request, or may occur if the router or host’s buffer is approaching its limit.
