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What are two functions of the data link layer? (Choose two.)
It segments and reorders the data.
It exchanges data between programs that are running on the source and destination hosts.
***It controls how data is placed onto the media.
It generates signals to represent the bits in each frame.
***It encapsulates each packet with a header and a trailer to transfer it across the local media.
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1. Data Link layer do not reorder data - this is the job of Transport Layer
2. Programs are at Aplication Layer
4. Physical Layer generate signals
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IEEE has divided the Transport layer into two sublayers?
No. It is the Data Link layer that IEEE has divided into two sublayers. The Data Link layers are Logical Link Control and Media Access Control.
Which particular layer of OSI model is not required if two devices communicate at the same network?
In this situation Network Layer may not be required. Data Link Layer can handle communication process. If two devices are communicating from different networks then Network Layer a is must. In this situation Data Link Layer is not enough for completing the communication process as it lacks Routing ability which is the primary function of Network Layer.
If data link layer detect error why do you think we need transport layer?
because in the data link layer two routers communitate directly via a physical channel , whereas at the transport layer this physical channel is replaced by the entire subnet. In the data link layer ,it is not necessary for a router to specify which router it wants to talk to each outgoing line uniquely specifies a panicular router . In the transport layer explicit addressing of destinations is required.
In networking what is hop to hop delivery of packets?
The Hop-to-hop delivery is also called the node-to-node delivery and it is the delivery between two nodes connected to the same network by a link and this jib is carried out by the data link layer....
What security advantage occurs from Packaet's containing the source NIC address and not just the destination NIC address?
The message must travel from your computer to your router. Every computer connected to a network has a network interface card (NIC) with a unique physical address, called a MAC address (for Media Access Control). At the data link level, two more headers are added, one for your computer's NIC address (the source MAC) and one for your router's NIC address. A data link layer structure with destination MAC, source MAC, and data is called a frame. Every NIC selects from the network those frames with its own address as a destination address. The data link layer adds the structure necessary for data to get from your computer to another computer (a router is just a dedicated computer) on your network. Data Link Layer Transformation.
