article thumbnail

CCNA: TCP/IP Stack

The Network DNA

It specifies how data should be packetized, addressed, transmitted, and routed across the network. TCP/IP stack has four layers Application, Transport, Internet, and Network Interface. The OSI Layer Data Link and Physical layer maps to the Network Interface layer of the TCP/IP stack.

TCP 52
article thumbnail

Network Troubleshooting in Depth: A Complete Guide

Kentik

On a network, configurations are constantly changing. Unfortunately, configuration change accidents can happen that bring down parts of the network. Interface dropping packets. Interface issues caused by misconfigurations, errors, or queue limits lead to network traffic failing to reach its destination.

Network 114
Insiders

Sign Up for our Newsletter

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Trending Sources

article thumbnail

SASE Enables Consistent Security for the Modern Enterprise

CATO Networks

The company managed its own data centers, and employees were primarily connected directly to the corporate LAN. Within the last several years, the corporate network has undergone significant changes. Limited Scalability : Appliance-based security solutions, such as network firewalls , are limited by their hardware.

SASE 52
article thumbnail

Closing the Network Performance Monitoring Gap and Achieving Full Network Visibility

Kentik

For one, if you’re using an appliance, even a virtual one, you’re assuming that you can connect to and record packets from a network interface of some sort. API calls may be happening between all sorts of components within a cloud that don’t have a distinct “network interface” that an appliance can attach to.

Network 40
article thumbnail

IoT has an identity problem. Here’s how to solve it

CATO Networks

Figure 1: Different network protocols for OS identification based on the OSI model Starting from the bottom of the stack, at the data link layer, exists the medium access control (MAC) protocol. Over this protocol, a unique physical identifier, called the MAC address, is allocated to the network interface card (NIC) of each network device.

IoT 52
article thumbnail

The Why and How of Interface Classification

Kentik

Classifying Network Interfaces Enhances Engineering and Business Insights. Given that Kentik was founded primarily by network engineers, it’s easy to think of our raison d’etre in terms of addressing the day-to-day challenges of network operations.