LFCS · Question #281
Which of the following describes the Linux ping packet or datagram?
The correct answer is B. ICMP packet with a message type. The ping command utilizes the Internet Control Message Protocol (ICMP) for network diagnostics, sending and receiving ICMP echo messages.
Question
Options
- AIP packet with a packet type
- BICMP packet with a message type
- CICMP packet with a payload
- DUDP datagram with a protocol type
- EUDP datagram with a payload
How the community answered
(23 responses)- A4% (1)
- B91% (21)
- C4% (1)
Why each option
The `ping` command utilizes the Internet Control Message Protocol (ICMP) for network diagnostics, sending and receiving ICMP echo messages.
While ICMP packets are encapsulated within IP packets, 'IP packet with a packet type' is too general and does not specify the crucial ICMP protocol used by `ping`.
`ping` works by sending ICMP Echo Request packets and listening for ICMP Echo Reply packets, which are specifically identified by their ICMP message types and codes.
Although ICMP packets can carry a payload, the fundamental characteristic that defines a ping request or reply is its specific ICMP message type, not merely the presence of a payload.
`ping` does not use the User Datagram Protocol (UDP); it directly uses ICMP, which operates at the network layer, building directly on IP.
`ping` does not use UDP for its operations; therefore, a UDP datagram with a payload is an incorrect description.
Concept tested: ICMP protocol for network diagnostics
Source: https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/ping
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