role of cables : You should use straight-through cable when you want to connect two devices of different types. You should use a crossover cable when you want to connect two devices of the same type. It helps you connect a router's WAN port to a cable or DSL modem's LAN port

 

Which device is used to regenerate the signal if signal loss is their

A network repeater is used to regenerate or amplify signals in a network to extend the reach of a transmission. In more detail, a network repeater is a device used in data communications to regenerate or replicate a signal

Which device is used in network for Security

FirewallsFirewalls. Firewalls are one of the most fundamental network security appliances. Like many other security devices, firewalls can come in hardware or software forms.

 

What is the functioning of Router

A router is a device that connects two or more packet-switched networks or subnetworks. It serves two primary functions: managing traffic between these networks by forwarding data packets to their intended IP addresses, and allowing multiple devices to use the same Internet connection.

 

the role of Network Bridge

A bridge in a computer network is a device used to connect multiple LANs together with a larger Local Area Network (LAN). The mechanism of network aggregation is known as bridging. The bridge is a physical or hardware device but operates at the OSI model's data link layer and is also known as a layer of two switches.

 

difference between HUB and Switch

Key Differences Between Hub and SwitchA hub is a networking device that connects multiple PCs to a single network, whereas a Switch connects multiple devices on a single computer network. A hub operates on the OSI physical layer, whereas a switch operates on the OSI data link layer.