Computer Networking
Which of the following are unique characteristics of half-duplex Ethernet when compared to full-duplex Ethernet?1. Half-duplex Ethernet operates in a shared collision domain.2. Half-duplex Ethernet operates in a private collision domain.3. Half-duplex Ethernet has higher effective throughput.4. Half-duplex Ethernet has lower effective throughput.

1,2 and 3
1 and 4
2 only
4 only

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Computer Networking
The term 'duplex' refers to the ability of the data receiving stations to echo back a confirming message to the sender. In full duplex data transmission, both the sender and the receiver

can receive and send data simultaneously
can do one way data transmission only
None of these
cannot talk at once
can send or receive data one at a time

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Computer Networking
What is route poisoning?

It describes when a router sets the metric for a downed link to infinity.
It prevents regular update messages from reinstating a route that has just come up.
It sends back the protocol received from a router as a poison pill, which stops the regular updates.
It is information received from a router that can't be sent back to the originating router.

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Computer Networking
When a new trunk link is configured on an IOS-based switch, which VLANs are allowed over the link?

No VLAN's are allowed, you must configure each VLAN by hand.
By default, all VLANs are allowed on the trunk.
Only configured VLAN's are allowed on the link.
Only extended VLAN's are allowed by default.

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