D413 Telecom and Wireless Communications - Set 3 - Part 1

Correct Answer: It allows devices to connect directly without a wireless access point

In an ad hoc network, devices communicate directly with each other without using a centralized access point, often used for temporary or small-scale wireless networks.

Correct Answer: Surge protector

A surge protector shields electronic devices from voltage spikes by blocking or shorting to ground any unwanted voltage above a safe threshold.

Correct Answer: A primary network cable that connects various segments of a network

The backbone in a network refers to the main transmission path that connects various smaller segments of a network, often carrying large amounts of traffic.

Correct Answer: Integrated Services Digital Network

ISDN stands for Integrated Services Digital Network, a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the public switched telephone network.

Correct Answer: Acts as an intermediary between a client and a server for security purposes

A proxy server serves as an intermediary between a client and another server, often used to improve security, control access, or cache content.

Correct Answer: Mesh topology

In a mesh topology, every node connects to every other node, ensuring redundancy and providing multiple paths for data to travel through the network.

Correct Answer: To filter network traffic based on security rules

A firewall monitors and controls incoming and outgoing network traffic based on predefined security rules, protecting the network from unauthorized access and threats.

Correct Answer: A physical network interface device

A MAC address is a unique identifier assigned to a network interface card (NIC) for communication at the data link layer of a network.

Correct Answer: A network segment that isolates public-facing servers from the internal network

A DMZ is a section of a network that contains publicly accessible resources, such as web servers, while keeping them isolated from the internal network for security reasons.

Correct Answer: ARP

Address Resolution Protocol (ARP) is used to map an IP address to the corresponding MAC address, enabling devices on a network to communicate.

Correct Answer: The loss of signal strength over distance

Attenuation refers to the reduction in signal strength as it travels over a distance, which can result in weaker and less reliable data transmission.

Correct Answer: Broadcast address

A broadcast address sends data to all devices on a network, typically used for network-wide communications like DHCP requests.

Correct Answer: To map domain names to IP addresses

A DNS server resolves human-readable domain names (like www.example.com) to numerical IP addresses, allowing easier navigation and access to websites.

Correct Answer: To provide error correction and ensure data is delivered reliably

The transport layer (Layer 4) is responsible for ensuring reliable data transfer by managing error correction, packet sequencing, and flow control.

Correct Answer: Star topology

In a star topology, all network nodes are connected to a central device such as a hub or switch, which manages the communication between them.

Correct Answer: VLAN Trunking Protocol (VTP)

VLAN Trunking Protocol (VTP) allows multiple VLANs to communicate across a single network link by tagging VLANs with identifiers.

Correct Answer: A backup hard drive that automatically replaces a failed drive without user intervention

In a RAID configuration, a hot spare is a backup drive that is immediately used to replace a failed drive, ensuring data redundancy and fault tolerance.

Correct Answer: Assigns IP addresses dynamically to devices

A DHCP server automatically assigns IP addresses to devices on a network, streamlining the process of network configuration and management.

Correct Answer: A wireless access point installed without authorization

A rogue access point is an unauthorized device added to a network, which can pose a significant security risk by providing unmonitored entry points.

Correct Answer: Electromagnetic interference (EMI)

Electromagnetic interference (EMI) can cause signal interference in wireless networks, resulting in reduced performance or dropped connections.