What is the proper term to refer to a single unit of Ethernet data at the link layer of the DoD TCP model ?

Question

Exhibits

Options

• AEthernet Segment.
• BEthernet Datagram.
• CEthernet Frame.
• DEthernet Packet.

• A
  7% (3)
• B
  2% (1)
• C
  88% (36)
• D
  2% (1)

Explanation

Ethernet is frame based network technology. See below a few definitions from RFC 1122: A segment is the unit of end-to-end transmission in the TCP protocol. A segment consists of a TCP header followed by application data. A segment is transmitted by encapsulation inside an IP A packet is the unit of data passed across the interface between the internet layer and the link layer. It includes an IP header and data. A packet may be a complete IP datagram or a fragment of an IP datagram. A frame is the unit of transmission in a link layer protocol, and consists of a link-layer header followed by a packet. The following answers are incorrect: Ethernet segment. Is incorrect because Ethernet segment is a distractor, TCP segment would be the correct terminology. Ethernet is a frame based network technology, Ethernet datagram. Is incorrect because Ethernet datagram is a distractor, IP datagram would be the correct terminology. Ethernet is a frame based network technology Ethernet packet. Is incorrect because Ethernet packet is a distractor, a Packet is a group of information so would not be a "single unit". Ethernet is a frame based network technology. Look at the diagrams below that were extracted from my Security+ Computer Based Tutorial. TCP/IP Data Structures The names used on the diagram above are from RFC 1122 which describe the DOD Model. Vendors and Books may use slightly different names or even number of layers. TCP/IP Data Structure

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