D413 Telecom and Wireless Communications - Set 2 - Part 3

Correct Answer: It disguises itself as a legitimate program to gain access to a system

A Trojan horse is malware that appears to be a legitimate program but contains malicious code that can harm or compromise a system.

Correct Answer: RTP

Real-Time Transport Protocol is designed to deliver audio and video data in real-time over IP networks.

Correct Answer: To allow devices with private IP addresses to access public networks

NAT allows devices on a private network to access public networks like the internet by translating private IP addresses into public ones.

Correct Answer: Virtual Private Network

A Virtual Private Network creates a secure, encrypted connection over a public network, allowing users to access private resources remotely.

Correct Answer: To authenticate users and devices on a network

Kerberos is a network authentication protocol that securely verifies the identity of users and devices on a network.

Correct Answer: To transmit raw data over a physical medium

The physical layer is responsible for transmitting raw data bits over a physical medium, such as cables or wireless signals.

Correct Answer: Router

A router connects multiple networks together and directs data traffic between them based on IP addresses, ensuring efficient communication.

Correct Answer: A backup device that automatically replaces a failed component without human intervention

A hot spare is a backup device that is always powered on and can automatically replace a failed system component without requiring manual intervention.

Correct Answer: IMAP

IMAP allows email clients to download and synchronize messages from a mail server.

Correct Answer: Variability in the timing of packet delivery

Jitter refers to small variations in the timing of data packet delivery, which can cause disruptions in the quality of real-time communications like voice and video.