2024/2025 fully solved & updated
List two advantages and two disadvantages of fibre-optic cable compared to UTP.
- ANSWER-Fibre-optic advantages:
- travels greater distance
- more secure
Fibre-optic disadvantages:
- more expensive to buy and manufacture
- harder to repair - needs specific equipment
UTP advantages:
- cheaper to manufacture
- easier to use and install
UTP disadvantages:
- more vulnerable to noice
- max length 100m
Briefly describe VLANs and why they are used. - ANSWER-A virtual local area
network (VLAN) are created by grouping certain ports together on one or more
switches to make a separate network. They are used to separate networks into
smaller, more manageable networks, and are used for similar reasons for using
subnetting.
Briefly explain the steps of the CSMA/CA process used by Wi-Fi. - ANSWER-The
node checks for any activity on a channel. If the channel is quiet, the packet is
sent. Otherwise, it waits a random backoff time, then check again to see if the
channel is clear. In an access method, the node will send an RTS (ready to send)
signal and the access point will indicate for the node to transmit data with a CTS
(clear to send) signal.