The Network DNA

JUNE 19, 2024

CCNA: TCP Sequence & Port Number This article can be read as the second part of the previous article CCNA: 3-Way Handshake where we discussed what makes TCP a reliable protocol for transmitting information. Lets discuss the TCP SEQ and Port numbers in this article. These applications are identified using the port numbers.

Port 52

Port TCP Ethernet LAN 52

The Network DNA

JULY 16, 2024

A switch forwards the broadcast out all the ports in same VLAN (except the port where broadcast was received). To do that it builds the Ethernet Frame and puts its MAC address as the Source MAC address (SMAC) and layer 2 broadcast address (ff:ff:ff:ff:ff:ff). All hosts in same VLAN received this ARP request including PC-2.

Protocol 98

Protocol Ethernet IP Address LAN 98

The Network DNA

JUNE 24, 2024

This table is populated automatically when a switch receives a frame on a port. As a frame is received on a port, its source MAC address is noted. The switch receives the frame from PC-1 that contains the MAC address 80::01 on port 1. Port 1 is configured as a member of VLAN-11. Then PC-1 wants to communicate with PC-2.

Ethernet 52

Ethernet Port LAN Protocol 52

CATO Networks

SEPTEMBER 11, 2023

Introduction Organizations need to protect themselves from the risks of running their business over the internet and processing sensitive data in the cloud. With Catos LAN Firewall policy, you can configure rules for allowing or blocking LAN traffic directly on the Socket, without sending traffic to the POP.

LAN 52

LAN Cloud Firewall WAN 52

CATO Networks

APRIL 6, 2023

This is because datacenter firewalls dont just address the need for secure Internet access, which is the main SSE capability. Rather, these firewalls are also used for securing WAN access, datacenter LAN segmentation and ensuring reliability and high availability to network traffic.

Firewall 52

Firewall LAN WAN Internet 52

The Network DNA

JUNE 17, 2024

Lets say HTTP uses port 80 to identify the application at PC-2, PC-1 chooses Port 80 as the destination port and selects a random port 36000 as the source port. PC-1 and PC-2 both have received and acknowledged a sequence of packets from one another. Now actual data transfer happens. Continue Reading.

TCP 52

TCP Ethernet Port LAN 52

Akins IT

NOVEMBER 1, 2019

NSGs use the source and destination address and/or port methodology which doesnt provide application layer visibility and logic. The outside subnet will be used for the appliances WAN interface, and inside for the LAN. It can also become overly complex to implement and troubleshoot as the environment increases in scale.

LAN 52

LAN Firewall Port Network Security 52