CCNA Certification Course in Chennai

A switch connects bias within an original area network( LAN) and uses MAC addresses to further data. A router connects multiple networks together and determines the best path to further data using IP addresses, working across broader network boundaries.

TCP is dependable and ensures ordered delivery through handshakes and acknowledgments, suitable for tasks like web browsing or train transfers. UDP sends data without connection setup, making it briskly for time-sensitive tasks like videotape streaming, but it does not guarantee delivery.

A subnet mask splits an IP address into network and host portions. It determines how many biases can live within a subnet and helps route business efficiently by defining network boundaries.

VLANs allow grouping of devices logically rather than physically. This reduces broadcast business, increases security by segregating departments or services, and makes managing large networks more flexible.

Stationary routes are set up manually and remain fixed until they're modified. They are stable and simple, but not scalable. Dynamic routing adjusts automatically to changes using protocols like OSPF or RIP, making it ideal for large, evolving networks.

NAT( Network Address restatement) enables bias with private IP addresses to pierce external networks like the internet by rephrasing them to a public IP address. It helps save IP space and adds a subcaste of sequestration.

The OSI model breaks down networking into seven layers, each responsible for specific functions. It helps masterminds understand how data travels, detect faults snappily, and design systems that interoperate effectively.

This Cisco command lists all interfaces along with their IP addresses, functional status, and protocol state. It's frequently used to get a quick summary of a device’s interface health and configuration.

Port security restricts access to switch anchorages based on MAC addresses. It limits the number of biases that can connect to a harborage and can shut down the harborage or block unknown addresses, helping prevent unauthorized access.