QUESTION: 125

Why is UDP more suitable than TCP for applications that require low latency such as VoIP?

UDP reliably guarantees delivery of all packets: TCP drops packets under heavy load
UDP uses sequencing data for packets to arrive in order TCP offers the capability to receive packets in random order
TCP uses congestion control for efficient packet delivery: UDP uses flow control mechanisms for the delivery of packets
TCP sends an acknowledgement for every packet received: UDP operates without acknowledgments

Answer(s): D

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QUESTION: 126

What are the two functions of SSIDs? (Choose two.)

uses the maximum of 32 alphanumeric characters
controls the speed of the Wi-Fi network
used exclusively with controller-based Wi-Fi networks
supports a single access point
broadcasts by default

Answer(s): A,E

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QUESTION: 127

Which two characteristics describe the access layer in a three-tier network architecture? (Choose two.)

serves as the network aggregation point
physical connection point for a LAN printer
designed to meet continuous redundant uptime requirements
layer at which a wireless access point connects to the wired network
provides a boundary between Layer 2 and Layer 3 communications

Answer(s): B,D

Explanation:

The Access Layer is the one closer to the users. In fact, at this layer, we find the users themselves and the access-layer switches. The main purpose of this layer is to physically connect users to the network. In other words, there is just a cable between end-user PCs, printers, and wireless access points and access-layer switches.

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