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

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

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Computer Networking
How does a host on an Ethernet LAN know when to transmit after a collision has occurred?1. In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.2. In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.3. You can improve the CSMA/CD network by adding more hubs.4. After a collision, the station that detected the collision has first priority to resend the lost data.5. After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data.

2 and 5
1,3 and 4
2 and 4
1 and 3

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