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What is timestamp request and reply query message in ICMP What is the application of timestamp request and reply message show it using an example?
The ICMP Timestamp Request and Timestamp Reply query messages provide the ability to determine the length of time that ICMP query messages spend in transit, which is extremely useful for measuring the latency across a specific network.
Which of these is used in ICMP?
So, to address these issues a network layer protocol called Internet Control Message Protocol is used. ICMP operates over the IP packet to provide error reporting functionality. Explanation: An ICMP message has an 8-byte header and a variable size data section.
What are various ICMP messages?
Many of the types of ICMP message are now obsolete and are no longer seen in the Internet. Some important ones which are widely used include: Echo Reply (0), Echo Request (8), Redirect (5), Destination Unreachable (3), Traceroute (30), Time Exceeded (11). Many of these ICMP types have a “code” field.
What is ICMP timestamp response?
The ICMP timestamp response contains the remote host’s date and time. This information could theoretically be used against some systems to exploit weak time-based random number generators in other services. ICMP information such as (1) netmask and (2) timestamp is allowed from arbitrary hosts.
What are the benefits of ICMP protocol?
ICMP protocol helps network administrators by assisting them in diagnosing networking issues. Most issues that arise, like server outages or computer failure, are determined with two helpful commands. These commands are PING and TRACERT.
What is query message in ICMP?
ICMP sends query and error reporting messages. The error-reporting messages report problems that a router or a host (destination) may encounter when it processes an IP packet. The query messages, which occur in pairs, help a host or a network manager get specific information from a router or another host.
What is the purpose of ICMP message?
Explanation:The purpose of ICMP messages is to provide feedback about issues that are related to the processing of IP packets.
What does a Timestamp reply message in ICMP mean?
Timestamp Reply message contains other router’s date and time. ICMP Timestamp Request and Timestamp Reply messages are not used much these days, because there an entire protocol itself is dedicated for network device time synchronization. Network Time Protocol (NTP) is the standard protocol used for time synchronization.
Can a timestamp request be sent to an IP multicast address?
An ICMP Timestamp Request message to an IP broadcast or IP multicast address MAY be silently discarded. The IP source address in an ICMP Timestamp Reply MUST be the same as the specific-destination address of the corresponding Timestamp Request message. the Timestamp Reply message.
What should be included in a Timestamp reply?
If a Record Route and/or Timestamp option is received in a Timestamp Request, this (these) option(s) SHOULD be updated to include the current host and included in the IP header of the Timestamp Reply message. Incoming Timestamp Reply messages MUST be passed up to the ICMP user interface.
How are timestamp and reply used in Ping?
The usual ping command uses ECHO REQUEST and ECHO REPLY, as you’ve seen. It does indeed locally keep track of sent time and matches with the incoming reply to determine the round trip time. TIMESTAMP and TIMESTAMP REPLY are pretty rare, and many sites simply don’t answer, as many systems managers believe it to be a security issue, albeit minor.