Error Reporting (ICMP) | Computer Networks - Computer Science Engineering (CSE) PDF Download

Error Reporting (ICMP)
While IP is perfectly willing to drop data grams when the going gets tough for example. When a router does not know how to forward the data gram or when one fragment of a datagram fails to arrive at the destination it does not necessarily fail silently. IP is always configured with a companion protocol, known as Internet Control Message Protocol (ICMP) that defines a collection of error messages that are sent back to the source host whenever a router or host is unable to process an IP data gram successfully. For example, ICMP defines error message indicating that the destination host is unreachable, that the reassembly process failed, that the TTL had reached 0, that the IP header checksum failed and so on. ICMP defines a handful of control message that a router can send back to a source host. Ex., ICMP-redirect tells the source host that there is better route to the destination.

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FAQs on Error Reporting (ICMP) - Computer Networks - Computer Science Engineering (CSE)

1. What is ICMP and how is it related to error reporting?
Ans. ICMP stands for Internet Control Message Protocol. It is a network protocol used by network devices to send error messages and operational information. ICMP is closely related to error reporting as it provides a way for devices to send error messages to indicate issues or errors encountered during network communication.
2. Why is error reporting important in ICMP?
Ans. Error reporting in ICMP is important as it allows network devices to inform each other about issues or errors encountered during network communication. By receiving error messages, devices can take appropriate actions to correct or handle the errors, ensuring efficient and reliable network communication.
3. How does ICMP error reporting work?
Ans. ICMP error reporting works by sending error messages, known as ICMP error messages, back to the source IP address when an issue or error is encountered during network communication. These error messages provide specific information about the error, such as the type of error, the affected protocol, and any relevant details. The source device can then use this information to diagnose and resolve the error.
4. What are some common types of ICMP error messages?
Ans. Some common types of ICMP error messages include Destination Unreachable, Time Exceeded, Redirect, Parameter Problem, and Echo Request/Reply. Each type of error message serves a specific purpose and provides information about different types of errors encountered during network communication.
5. How can ICMP error reporting be used for network troubleshooting?
Ans. ICMP error reporting can be used for network troubleshooting by providing valuable information about errors encountered during network communication. Network administrators can analyze ICMP error messages to identify the source and nature of the error, helping them troubleshoot and resolve network issues more effectively. Additionally, ICMP error reporting can be used to monitor network performance and detect potential problems before they cause significant disruptions.
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