The Network DNA

JUNE 4, 2024

CCNA: TCP/IP Stack TCP/IP Stack is the most widely used protocol stack. TCP/IP stack is a conceptual model consisting of network communication protocols. TCP/IP stack has four layers Application, Transport, Internet, and Network Interface. TCP/IP networks use TCP or UDP protocol at this layer.

TCP 52

TCP Ethernet Protocol LAN 52

The Network DNA

JUNE 17, 2024

CCNA: TCP 3-Way Handshake In this article, lets take a look at TCP three-way handshake and other useful information that makes TCP a reliable communication protocol. Before TCP can send any traffic, it first contacts the other device and establish a reliable and controlled connection.

TCP 52

TCP Ethernet Port LAN 52

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. TCP breaks this information into two pieces CC and NA.

Port 52

Port TCP Ethernet LAN 52

The Network DNA

JULY 16, 2024

CCNA RnS Article #27: VLAN Trunking Configuration CCNA RnS Article #26: Configuring VLANs CCNA RnS Article #25: Inter-VLAN Routing CCNA RnS Article #24: VLAN Tagging CCNA RnS Article #23: Virtual LAN (VLAN) Concept CCNA RnS Article #22: Interface Auto-negotiation in Action!

Protocol 98

Protocol Ethernet IP Address LAN 98

The Network DNA

JULY 31, 2024

An administrator configures default gateway configuration manually while configuring the system on the LAN or it can be configured automatically using the DHCP protocol. Any host that is not part of the source device network can be reached through the default router or gateway.

IP Address 98

IP Address Ethernet Routers Gateway 98

Network Engineering

JANUARY 17, 2025

Starting from this MTU, I should be able to calculate the optimal MSS value to be set for my LAN interfaces, right? There are many values and recommendations, but as far as I understand the real question is what is the actual MTU of the WAN link which depends on the type of connection (cable, PPPoE, etc.). With 1473 I get fragmentation.

WAN 52

WAN TCP LAN Gateway 52

The Network DNA

JANUARY 26, 2025

CCNA RnS Article #27: VLAN Trunking Configuration CCNA RnS Article #26: Configuring VLANs CCNA RnS Article #25: Inter-VLAN Routing CCNA RnS Article #24: VLAN Tagging CCNA RnS Article #23: Virtual LAN (VLAN) Concept CCNA RnS Article #22: Interface Auto-negotiation in Action!

Ethernet 59

Ethernet LAN Protocol TCP 59