which of the following is not a field in the ethernet frame header course hero

Which fields are contained within an IEEE Ethernet frame header?

Which fields are contained within an IEEE Ethernet frame header? 1. Source and destination MAC address 2. Source and destination network address 3. Source and destination MAC address and source and destination network address 4. FCS field

What information does an Ethernet frame contain?

An Ethernet frame has source and destination MAC addresses, an Ether-Type field to identify the Network layer protocol, the data, and the FCS field that holds the answer to the CRC. E. All of the above Routers operate at layer _____.

How do I examine the contents of an Ethernet II frame?

In Part 1, you will examine the header fields and content in an Ethernet II frame. A Wireshark capture will be used to examine the contents in those fields. Step 1: Review the Ethernet II header field descriptions and lengths. Step 2: Examine the network configuration of the PC.

How many bytes is a frame type in Ethernet II?

For Ethernet II frames, this field contains a hexadecimal value that is used to indicate the type of upper–layer protocol in the data field. There are numerous upper–layer protocols supported by Ethernet II. Two common frame types are these: Contains the encapsulated upper–level protocol. The data field is between 46 – 1,500 bytes.

What are the fields in an Ethernet frame header?

Ethernet header. Ethernet header contains five fields; Preamble, SFD, Destination, Source, and Type. Let's understand each field in detail.

What are the 6 parts of an Ethernet frame?

Ethernet framePreamble – informs the receiving system that a frame is starting and enables synchronisation.SFD (Start Frame Delimiter) – signifies that the Destination MAC Address field begins with the next byte.Destination MAC – identifies the receiving system.Source MAC – identifies the sending system.More items...

What does Ethernet header contain?

Ethernet header contains both Source and Destination MAC address, after which the payload of the frame is present. The last field is CRC which is used to detect the error.

What is type field in Ethernet frame?

EtherType is a two-octet field in an Ethernet frame. It is used to indicate which protocol is encapsulated in the payload of the frame and is used at the receiving end by the data link layer to determine how the payload is processed. The same field is also used to indicate the size of some Ethernet frames.

Which of the following is not included in the Ethernet frame format?

Which of the following is not included in the Ethernet frame format? Explanation: The Ethernet frame format includes preamble, destination and source addresses, length, data and the check sequence. MAC is the protocol which is used for sharing the network nodes.

How many headers does Ethernet frame have?

Like the HDLC protocol described in Section 2.3. 2, the Ethernet is a bit-oriented framing protocol. Note that from the host's perspective, an Ethernet frame has a 14-byte header: two 6-byte addresses and a 2-byte type field.

What does a frame header contain?

A frame header contains the destination address, the source address and three control fields kind, seq, and ack serving the following purposes: kind: This field states whether the frame is a data frame or it is used for control functions like error and flow control or link management etc.

Which of the following is present in Ethernet frame?

Explanation: The Ethernet frame has a header that contains the source and destination MAC address. Each MAC address is of 48 bits.

What is included in header of a frame Mcq?

Explanation: in a frame, the header is a part of the data that contains all the required information about the transmission of the file. it contains information like synchronization bytes, addresses, frame identifier etc.

What does a frame fields include?

Frame fields include the following: Frame start and stop indicator flags – Used to identify the beginning and end limits of the frame. Addressing – Indicates the source and destination nodes on the media. Type – Identifies the Layer 3 protocol in the data field.

How many types of Ethernet are there?

three cable typesThere are three cable types commonly used for Ethernet cabling: coaxial, twisted pair, and fiber-optic cabling. In today's LANs, the twisted pair cabling is the most popular type of cabling, but the fiber-optic cabling usage is increasing, especially in high performance networks.

What is the Ethernet frame?

An Ethernet frame is a piece of data along with the information that is required to transport and deliver that piece of data. In networking reference models, such as; OSI Seven Layers model and TCP/IP, the Ethernet frame is defined in the Data link layer.

What happens when multiple protocols are running in the upper layer of the network?

If multiple protocols are running in the upper (network) layer of the destination computer, the data link layer will fail to hand over the received frame to the upper layer as it does not know to which protocol it should give the received frame.

What does SFD mean in Ethernet?

The SFD byte indicates the receiving device that the next byte is the destination MAC address of the Ethernet frame.

How long is the SFD field?

The SFD (Start Frame Delimiter) field is 1 byte long. It contains a string of 1 byte. This byte also stores the same pattern, except the last bit. In the last bit, it stores 1 instead of the 0. The following image shows both fields with their related bytes respectively.

How many bytes are in the preamble?

The preamble field is 7 bytes long. It contains a string of 7 bytes. Each byte alternatively stores 1 and 0 to make the pattern '10101010'. Preamble bytes help the receiving device to identify the beginning of an Ethernet frame. When a device receives 7 continuous bytes of the same pattern (10101010), it assumes that the incoming data is an Ethernet frame and it locks the incoming bit-stream.

What is the maximum size of a field in a network?

This field stores the encapsulated data of the upper layer. This field has a size limit of 46 bytes (minimum) to 1500 bytes (maximum). Due to this limit, the network (upper) layer can't pack more or less data in a single packet (encapsulated data of the upper layer). If data is less than the minimum requirement, padding is added. If data is more than the maximum limit, extra data is packed in the next packet.

What is the data link layer?

The Data Link layer of the source computer prepares, packs and loads the Ethernet frame in the media. The Data link layer of the destination computer picks the Ethernet frame from the media. After picking the Ethernet frame, the Data link layer of the destination computer unpacks, processes, and hands over that Ethernet frame to the upper layer for further processing.

What is the layer 2 frame?

When upper layer protocols communicate with each other, data flows down the Open Systems Interconnection (OSI) layers and is encapsulated into a Layer 2 frame. The frame composition is dependent on the media access type. For example, if the upper layer protocols are TCP and IP and the media access is Ethernet, then the Layer 2 frame encapsulation will be Ethernet II. This is typical for a LAN environment.

What is the second line in the packet details pane?

The second line in the packet details pane shows that it is an Ethernet II frame. The source and destination MAC addresses are also displayed.

How to start Wireshark capture?

Click the Start Capture icon to start a new Wireshark capture. You will receive a popup window asking if you would like to save the previous captured packets to a file before starting a new capture. Click Continue without Saving.

What is the main window of Wireshark?

The Wireshark main window is divided into three sections: the packet list pane (top), the Packet Details pane (middle), and the Packet Bytes pane (bottom). If you selected the correct interface for packet capturing previously, Wireshark should display the ICMP information in the packet list pane of Wireshark.

How to apply Wireshark filter?

In the Wireshark Filter box, type icmp. The box should turn green if you typed the filter correctly. If the box is green, click Apply (the right arrow) to apply the filter.

What is ARP in Wireshark?

A filter has been applied to Wireshark to view the ARP and ICMP protocols only. ARP stands for address resolution protocol. ARP is a communication protocol that is used for determining the MAC address that is associated with the IP address. The session begins with an ARP query and reply for the MAC address of the gateway router, followed by four ping requests and replies.

How to see echo ping in packet list pane?

In the packet list pane (top section), click the first frame listed. You should see Echo (ping) request under the Info heading. The line should now be highlighted.