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

Engineering at Meta

OCTOBER 15, 2024

In today’s world, where more and more data center infrastructure is being devoted to supporting new and emerging AI technologies, open hardware takes on an important role in assisting with disaggregation. Those ideas have made Meta’s data centers among the most sustainable and efficient in the world.

Network 117

Network Networking Data Centers Port 117

The Network DNA

JULY 16, 2024

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). A switch forwards the broadcast out all the ports in same VLAN (except the port where broadcast was received). PC-2 now creates an Ethernet frame to respond to the ARP.

Protocol 98

Protocol Ethernet IP Address LAN 98

Engineering at Meta

AUGUST 5, 2024

Our paper, “ RDMA over Ethernet for Distributed AI Training at Meta Scale ,” provides the details on how we design, implement, and operate one of the world’s largest AI networks at scale. Distributed training, in particular, imposes the most significant strain on data center networking infrastructure.

Network 132

Network Networking Topology Data Centers 132

CloudFaire

JANUARY 3, 2025

For example, in a data center scenario, it's common to use interface bonding. After the initial TCP handshake, each peer may announce additional addresses (and ports) on which it can be reached. Typically, the server allows the client to reuse the server IP/port address. There are two ways of doing this. 4321 hmac 0x.,nop,nop],

TCP 137

TCP Port Server Advertising 137

Kentik

JANUARY 6, 2021

The critical context that enables teams to ask questions about users, applications, and customers (and not just IP addresses and ports). Data center : Leaf and spine switches, top of rack, modular, fixed and stackable. Campus : Ethernet switches, layer 2 and 3 switches, hubs and network extenders.

Network 128

Network Networking Gateway Access Point 128

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