Computer Networks

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.

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.

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.

The Internet is a global system of interconnected computer networks that use the Internet protocol suite to link devices worldwide. A header is data at the beginning of a packet or file, a homepage is the main page of a website, and Internet Protocol (IP) is a set of rules governing data routing.

A 'network' is a group or system of interconnected people or things, making 'connected system' the correct definition.

LAN stands for Local Area Network, which connects computers and devices within a limited geographical area such as a home, school, or office building. Other options like Lone Area Network or Long Area National are incorrect terms.

Laptop internal expansion cards, such as wireless network adapters, typically use the Mini-PCIe or newer M.2 form factor. USB and IEEE1394 (FireWire) are external interfaces, while Bluetooth is a wireless standard rather than an expansion slot interface.

PCI Express (PCIe) utilizes high-speed serial connections called lanes to transmit data, allowing for much higher bandwidth than older parallel standards. PCI, PCI-X, and AGP are older expansion slot standards that rely on parallel communication.

A network hub is a legacy device that lacks the intelligence to route traffic, so it broadcasts all incoming data packets to every connected port. Switches and routers are more advanced devices that direct traffic only to the intended recipient.