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In a network using the Spanning Tree Protocol (STP), ports on network switches can be in either a blocking or forwarding state. Ports in the forwarding state actively send and receive data, while those in the blocking state do not forward frames to prevent loops in the network topology. Switches dynamically switch ports between these states based on the network topology and the need to maintain a loop-free environment, particularly during changes such as link failures or topology changes. The root bridge and designated ports are typically in forwarding state, while non-designated ports may be blocked to prevent loops.

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Whart are the switch and bridge port characteristic of a layer two spaming-tree network that is fullycoverged?

a. All switch and bridge ports are in the forwarding state. b. All lkswitch and bridge ports are in the stand by state. c. All switch and bridge parts are assigned as either root or designed. d. All switch and bridge ports are in either the forwarding or blocking state. e. All switch and bridge are either blocking or looping.


Which process best describes selective forwarding in a switch?

forwarding packets to the port that is connected to the destination node


Which process best describes selective forwarding a switch?

forwarding packets to the port that is connected to the destination node


When a switch port is recovering from a failure which protocol allows it to transition to forwarding state?

When a switch port is recovering from a failure, the Spanning Tree Protocol (STP) allows it to transition to the forwarding state. STP helps prevent loops in network topologies by managing the state of switch ports, including listening, learning, and forwarding states. During recovery, the port goes through a series of state changes, ensuring it only transitions to forwarding when it is safe to do so. This process helps maintain network stability and integrity.


How is blocking related to a crossbar switch?

: Blocking can occur when two switch inputs attempt to access the same intermediate switch channel.


What switch mode offers minimum latency?

Cef (cisco express forwarding)


What is a mechanism that is used on Cisco Layer 3 switches to accelerate forwarding of Layer 3 packets?

Cisco Express Forwarding accelerates forwarding of packets on a Cisco Layer 3 switch by associating a MAC address with a next hop address in the FIB.


Which protocol is used by a switch to prevent forwarding loops in networks containing redundant paths?

STP


What address type does a switch use to make selective forwarding decisions?

destination mac address


How does a switch use store and forward?

In store-and-forward switching, the switch receives an entire data frame before forwarding it to the next hop in the network. This allows the switch to perform error checking on the entire frame before forwarding it, ensuring data integrity. The switch stores the frame temporarily in its memory, checks for errors, and then forwards it based on its destination address.


What is accurate about fast-forward switching?

The switch stores the first 64 bytes of the frame before forwarding.


Which layer of the OSI model does an access layer LAN switch use to make a forwarding decision?

Layer 2.

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