Mell What is contained in the Ethernet header and trailer?
What three items are contained in an Ethernet header and trailer? (Choose three.) Explanation: Layer 2 headers contain the following: Frame start and stop indicator flags at the beginning and end of a frame. Addressing – for Ethernet networks this part of the header contains source and destination MAC addresses.
What is in an Ethernet header?
Header. The header features destination and source MAC addresses (each six octets in length), the EtherType field and, optionally, an IEEE 802.1Q tag or IEEE 802.1ad tag. The EtherType field is two octets long and it can be used for two different purposes.
What does the frame trailer consist of in an Ethernet frame quizlet?
Each Ethernet frame contains a trailer with a cyclic redundancy check (CRC) of the frame contents. The Preamble (7 bytes) and Start Frame Delimiter (SFD), also called the Start of Frame (1 byte), fields are used for synchronization between the sending and receiving devices.
What is an Ethernet frame’s trailer?
When your computer communicates with another device on your network, the data being transmitted receives an Ethernet header and an Ethernet trailer. When a header and a trailer are attached to data to be sent across a network, this creates an Ethernet frame.
How long is the Ethernet header?
14 bytes
In this case, the type field has a hex value of 08 00, which means that the next embedded protocol that should be expected is IP. The length of the Ethernet header is static at 14 bytes, so we know that 00 is the last byte of the header.
What are different parts of an Ethernet frame?
In general, an Ethernet frame consists of 3 parts. They are Ethernet header (Preamble, SFD, Destination, Source and Type), Encapsulated data (Data and Pad), and Ethernet trailer (FCS). The picture below shows you an example of Ethernet frame so that you will have a basic understanding of the frame structure.
Which is type of address is used in an Ethernet frame header?
Each Ethernet frame starts with an Ethernet header, which contains destination and source MAC addresses as its first two fields. The middle section of the frame is payload data including any headers for other protocols (for example, Internet Protocol) carried in the frame.
What is the role of the header and trailer?
Framing : Role of the header and trailer lesson has shown some basic details of what a frame is and what it is composed of. However, it describes the role of the header and trailer in general, without delving into details and expounding each field profoundly. This present lesson is aimed to cover Ethernet frame in more details.
What are the items in a layer 2 header?
Layer 2 headers contain the following:Frame start and stop indicator flags at the beginning and end of a frame Addressing – for Ethernet networks this part of the header contains source and destination MAC addresses Type field to indicate what Layer 3 protocol is being used Error detection to determine if the frame arrived without error
What do you need to know about Ethernet frame?
Additionally, it is recommended to understand Ethernet frame in reference to the Data-link Layer, on the grounds that it is the layer where it is generated. As you have seen throughout the OSI layers, Transport and Network layers hugely participate in the transmission of data by generating headers added to each piece of data.