What’s true about shared and/or switched Ethernet LANs. a. a full-duplex (FDX) shared Ethernet LAN does...

What’s true about shared and/or switched Ethernet LANs.

		a. a full-duplex (FDX) *shared* Ethernet LAN does not require CSMA/CD
		b. *switched* Ethernet LANs do not experience data collisions because they operate as centralized/deterministic networks
		c. each node connected to a *shared* Ethernet LAN must read destination addresses of all transmitted packets to determine if it belongs to them
		d. *switched* Ethernet LANS are connected to nodes through dedicated links and therefore do not need to determine destination addresses of incoming packets

Expert Solution

Solution :

(a) a full-duplex (FDX) shared Ethernet LAN does not require CSMA/CD
= TRUE. Because there is no contention for use of a shared medium, the multiple access algorithms (i.e., Carrier Sense with Multiple Access and Collision Detect, or CSMA/CD) are unnecessary.
(b) switched Ethernet LANs do not experience data collisions because they operate as centralized/deterministic networks
= FALSE. Because in switched Ethernet, collisions do not occur in the channel due to the presence of a dedicated connection to each station. However, collisions may still occur in a destination port if it receives frames from more than one port simultaneously. And most importantly Ethernet is a decentralized control using a non-deterministic access method.
(c) each node connected to a shared Ethernet LAN must-read destination addresses of all transmitted packets to determine if it belongs to them.
=FALSE. A shared Ethernet LAN means that all members of the network are contending for transmission of data onto a single network (collision domain); individual members of a shared network get only a percentage of the available network bandwidth.
(d) switched Ethernet LANs are connected to nodes through dedicated links and therefore do not need to determine destination addresses of incoming packets.
= TRUE. In Switched Ethernet LANs, each station gets a dedicated connection. Switches make sure that each packet is delivered only to the host to which it is addressed.

venereology answered 1 week ago

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