At the network layer, a device connected to the Internet is identified for…
2010
At the network layer, a device connected to the Internet is identified for Internet Protocol communication by which type of address?
Answer: C. IP address — ConceptInternet Protocol communication uses logical network-layer addressing. An address at this layer identifies a network interface so packets can be routed…
- A.
e-mail address
- B.
street address
- C.
IP address
- D.
None of these options
Attempted by 155 students.
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Correct answer: C
Concept
Internet Protocol communication uses logical network-layer addressing. An address at this layer identifies a network interface so packets can be routed across interconnected networks.
Application identifiers and physical-location identifiers serve different purposes and do not replace the network-layer identifier used in an IP packet.
Application
For a device exchanging packets over the Internet, the relevant identifier in the Internet Protocol header is its IP address. Routers use the destination IP address when forwarding the packet toward the receiving network.
Contrast
An e-mail address identifies a mailbox for electronic messaging, not a network interface in an IP packet.
A street address identifies a physical postal or geographic location, not an Internet Protocol endpoint.
An IP address is the logical network-layer identifier carried in IP communication.
“None of these options” would apply only if no listed address type served this network-layer role; the list includes IP address.
Result
Therefore, the required identifier is an IP address.