Computer Networks

LAN (Local Area Network) connects computers in a limited geographical area like office, building, or campus using cabling or wireless. WAN covers large geographical areas, WiFi is a wireless technology, and Internet is a global network of networks.

Bridges connect network segments at the data link layer. Routers connect different networks using IP addresses. Gateways connect networks with different protocols or architectures. All three can be used to connect networks.

This technology abstracts the network into a generalised pool of network capacity.

This technology is deployed in a virtual appliance form factor, supports full active standby HA functionality and can support up to 9 CBps of traffic.

Mesh topology is excellent for long distance networking because it provides extensive backup, rerouting and pass through capabilities.

Gateway is used to connect dissimilar networks and operates at the highest layer of network abstraction.

Serial port in a computer is a communication channel that is used to transmit data from hardware devices to the processor.

Option (1) is the correct answer.

Dial-up is NOT a broadband connection - it uses narrowband analog telephone lines with maximum speeds around 56 Kbps. Cable, DSL, and satellite are all broadband technologies offering high-speed internet access. Broadband typically refers to connections faster than 256 Kbps, while dial-up is legacy narrowband technology.

Option (2) is the correct answer.

Option (4) is the correct answer.

Option (1) is the correct answer.

A modem (modulator-demodulator) converts digital signals from computers into analog signals that can travel over telephone lines, then converts analog signals back to digital at the receiving end. Routers direct traffic between networks, gateways connect different network architectures, and bridges connect network segments.