D413 Telecom and Wireless Communications - Set 1 - Part 1

Correct Answer: To navigate packets across large networks using the most efficient route

Routers are responsible for directing data packets across different networks by selecting the most efficient route. This is distinct from connecting devices locally, which is a function of hubs or switches.

Correct Answer: Communication that only allows one direction at a time

Half-duplex communication allows data to flow in both directions, but only one direction at a time, unlike full-duplex, which allows simultaneous communication.

Correct Answer: 802.3af (PoE)

Power over Ethernet (PoE) is specified by the IEEE 802.3af standard, which enables electrical power to be delivered over Ethernet cables to network devices like IP cameras or wireless access points.

Correct Answer: To resolve IP addresses to MAC addresses

ARP is used to map an IPv4 address to a device's physical (MAC) address, enabling communication within a network.

Correct Answer: It uses RG-58 coaxial cable

10Base2 is a network specification that uses RG-58 coaxial cable and supports data rates of 10 Mbps.

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

A proxy server serves as an intermediary for requests between a client and another server, often to enhance security or manage traffic.

Correct Answer: Ring topology

In a ring topology, all network devices are connected in a loop, allowing data to travel around the ring in one or both directions.

Correct Answer: It filters incoming and outgoing traffic based on security rules

Firewalls filter network traffic to prevent unauthorized access and protect a network from external threats.

Correct Answer: It can be removed and replaced without shutting down the system

Hot-swappable devices can be added or replaced without interrupting the system’s operation, improving uptime and flexibility.

Correct Answer: Transport layer

The transport layer ensures reliable data transmission by managing packet sequencing, error detection, and flow control.

Correct Answer: To segment a network logically without regard to the physical layout

A VLAN allows devices to be grouped logically into networks, improving network organization and security, regardless of physical location.

Correct Answer: It is a direct peer-to-peer connection without an access point

In ad hoc mode, devices communicate directly with each other without a central access point, typically for smaller, temporary networks.

Correct Answer: Automatic Private IP Addressing

APIPA automatically assigns an IP address in the absence of a DHCP server, typically used for small, simple network configurations.

Correct Answer: Incremental backup

Incremental backups only save changes made since the last backup, which reduces backup time and storage space compared to full backups.

Correct Answer: To resolve domain names to IP addresses

DNS servers translate human-readable domain names into numerical IP addresses, facilitating easier navigation on the internet.

Correct Answer: FTP

File Transfer Protocol (FTP) is designed specifically for transferring files between clients and servers over a network.

Correct Answer: Layer 6

The presentation layer (Layer 6) is responsible for translating data formats, ensuring proper character-code recognition, and managing data encryption.

Correct Answer: It can support up to 16 million hosts on each network

Class A networks are designed to support large numbers of hosts, with IP address ranges allowing millions of devices to be connected.

Correct Answer: Asymmetric-key encryption

Asymmetric encryption, also known as public-key cryptography, uses a pair of keys (public and private) to secure data.

Correct Answer: Access a remote server securely over the internet

A VPN enables users to establish a secure connection over a public network, typically the internet, to access private resources remotely.