TCP/IP layers, why is transport needed for communication? What is Subnet mask and how does it help in data communication. Why is Vlan needed? Based on what information does a switch and router send a packet or frame? Types of arp, What is port no.? Why is it needed? What is Ip, Mac address. Where can we find Mac address on devices other than switch and router such as our wifi device.

Question

Accepted Answer

Questions related to TCP/IP layers, subnet mask, VLAN, ARP, port number, IP and MAC addresses.

Transport layer is needed for reliable communication and error correction.
Subnet mask is used to identify the network and host portions of an IP address.
VLAN is needed for network segmentation and security.
Switches and routers send packets or frames based on destination IP address.
Types of ARP include ARP request and ARP reply.
Port number is used to identify the application or service running on a device.
IP address is a unique identifier for a device on a network.
MAC address is a unique identifier for a network interface.
MAC address can be found on devices such as laptops, smartphones, and IoT devices.

Accepted Answer

Mac address can found using cmd or command prompt in the search box of the taskbar

If we type the cmd ipconfig we can find the Mac address

Types of arp:

1) reverse arp

2)proxy arp

3)inverse arp

4) gratuitous arp

ARP means address resolution protocol

Based on the information switch and router share packet through

The switch uses the mac address to identify which device's outgoing packets are being sent, and where to deliver incoming packets.

The MAC address identifies the physical device and doesn't change, while the network layer (Layer 3) IP address, can be assigned dynamically to a device and change over time.

Why vlan needed.

VLAN allows different computers and devices to be connected virtually to each other as if they were in a LAN sharing a single broadcast domain. A VLAN is helpful for organizational use mainly because it can be used to segment a larger network into smaller segments.

Tcp layer,which transport is required for communication.

User datagram protocol

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