Computer Networks

A Metropolitan Area Network (MAN) is a computer network that interconnects users with computer resources in a geographic area or region larger than that covered by a LAN but smaller than a WAN.

VoIP, email, and instant messaging are all common and widely used methods for communicating over the internet.

When a port is set to dynamic auto and connects to a port set to dynamic desirable, the negotiation results in a trunk link.

Cisco switches do not tag frames that belong to the native VLAN when sending them across a trunk. If a frame arrives with a tag matching the native VLAN, it is typically dropped for security reasons.

Trunking protocols like 802.1Q use VLAN tags (a 4-byte header) inserted into the Ethernet frame to identify which VLAN the traffic belongs to.

VoIP traffic is time-sensitive and requires Quality of Service (QoS) prioritization, which is easier to manage when the traffic is isolated in its own VLAN.

VLAN 1 is the default VLAN. It is best practice to avoid using it for data, management, or as a native VLAN for security reasons (to prevent VLAN hopping).

LAN stands for Local Area Network, which is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, or office building.

CD-RWs use direct (or random) access, allowing the laser to jump directly to any location on the disc to read or write data. This is much faster than serial access, which requires reading through data sequentially.

An extranet is a private network that uses internet technology to securely share part of a business's information or operations with external users such as suppliers, vendors, or partners. While the internet is completely public, an extranet extends private access to specific external entities.

Two-way communication is an interactive process where the receiver responds to the sender's message. This response or reaction sent back to the sender is known as feedback.

Voice over IP (VoIP) is a technology that allows voice communication and multimedia sessions over Internet Protocol (IP) networks by converting voice signals into digital data packets. Visual Basic is a programming language, a virus is malicious software, and a viewer is an application for displaying files.

A packet is a formatted unit of data carried by a packet-switched computer network. A patch is a software update, a peer-to-peer network is a decentralized communication model, and a patent is a legal protection for inventions.

A computer network is a set of connected computers sharing resources and communicating with each other. A network engineer is a professional who designs networks, a network interface card is hardware that connects a computer to a network, and a podcast is an audio program.

P2P stands for peer-to-peer, which is a decentralized communications model in which each party has the same capabilities and either party can initiate a communication session. Network is a broader term, a plug-in is a software component, and a packet is a unit of data.