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Protocols Articles
Page 3 of 12
What is Stateful Inspection?
Stateful inspection is a firewall technology that monitors network connections and makes access control decisions based on the state and context of network traffic. Unlike simple packet filtering, stateful inspection maintains awareness of connection states and tracks the flow of data between networks. This technology examines both the state (connection status) and context (packet contents including IP addresses and port information) of network traffic. When a packet arrives, the firewall checks its state and context against established security policies to determine whether to allow or block the traffic. Stateful Inspection Process ...
Read MoreAdvantages and Disadvantages of NAT
Network Address Translation (NAT) is a widely used technology that enables devices on a private network to communicate with devices on the internet. NAT translates private IP addresses used on a local network into public IP addresses that can be recognized and routed over the internet. This technology serves as a bridge between private networks and the public internet, allowing multiple devices to share a single public IP address. How NAT Works Private Network ...
Read MoreAdvantages and Disadvantages of Static IP
In computer networking, IP addresses serve as unique identifiers that enable devices to communicate within a network. When configuring network infrastructure, administrators must choose between static and dynamic IP addressing schemes. A static IP address is a fixed address manually assigned to a device that remains constant over time, unlike dynamic addresses that change automatically. Static IP addressing offers specific benefits for certain network scenarios, particularly for servers and enterprise environments. However, it also presents challenges in terms of management overhead and security considerations that organizations must carefully evaluate. Static vs Dynamic IP Address ...
Read MoreDerive the efficiency of Pure ALOHA protocol
The word ALOHA originally means "hello" in Hawaiian. ALOHA is a random access protocol that operates at the MAC (Medium Access Control) layer of the OSI model. It allows multiple stations to transmit data over a shared communication channel without requiring coordination or scheduling. When multiple devices need to communicate over a single transmission medium, data collisions can occur if two or more stations transmit simultaneously. ALOHA protocols provide a mechanism to handle such situations and improve transmission efficiency despite the inherent collision problems. How ALOHA Works In ALOHA protocol, stations transmit data frames whenever they have ...
Read MoreDifference between AS Override and Allowas In
The Border Gateway Protocol (BGP) features AS Override and Allowas In are used to control how BGP routing information is exchanged between Autonomous Systems (AS). These mechanisms help network administrators handle specific scenarios where standard BGP loop prevention rules need to be bypassed for legitimate network designs. AS Override AS Override is a BGP configuration option that allows a border router in one AS to replace the AS number of the directly connected AS when advertising routes to another AS. This is particularly useful in service provider networks where customers use private AS numbers or in hub-and-spoke topologies. ...
Read MoreDifference between the bridge and gateway
In a computer network, physical devices are used to communicate from one to another. These devices are also called Network Hardware. The primary functions in computer networks are connectivity and controlling of network traffic. The network can be expanded or connected using network devices. A bridge is a network device that operates at the Data Link Layer to connect two LANs using the same protocol. A gateway is a network device that connects two disparate networks using different protocols, acting as a protocol converter and translator. Bridge vs Gateway Connection ...
Read MoreCisco Discovery Protocol(CDP) and Link Layer Dicovery Protocol(LLDP) in Data Link
The Cisco Discovery Protocol (CDP) and Link Layer Discovery Protocol (LLDP) are Layer 2 discovery protocols that enable network devices to share information about themselves with directly connected neighbors. These protocols are essential for network management, troubleshooting, and topology discovery. CDP is a proprietary Cisco protocol, while LLDP is an open IEEE 802.1AB standard that works across multiple vendors. Both protocols operate at the data link layer and help administrators understand network topology without requiring higher-layer protocols. How Discovery Protocols Work Discovery protocols send periodic advertisements containing device information to directly connected neighbors. These messages are transmitted ...
Read MoreElements of Network Protocol
Computers perform operations based on commands received. The set of commands or rules is sent and processed by the network protocol. In networks, different types of computers are connected which may possess different hardware and software components. Therefore, it is necessary to enable computers of different types to communicate with each other using common rules established by network protocols. Network Protocol A network protocol provides a set of rules to be followed for data transmission in a secure and reliable way. Examples of network protocols include SMTP (Simple Mail Transfer Protocol) for email communication and FTP (File Transfer ...
Read MoreDifference between IGRP and EIGRP
The distance-vector routing protocols IGRP (Interior Gateway Routing Protocol) and EIGRP (Enhanced Interior Gateway Routing Protocol) are both proprietary Cisco protocols used in enterprise networks. While IGRP was widely deployed in the 1980s and 1990s, EIGRP serves as its modern successor with significant improvements in performance and functionality. Understanding the differences between these protocols is essential for network engineers working with Cisco infrastructure, as EIGRP has largely replaced IGRP in contemporary network deployments. What is IGRP? Interior Gateway Routing Protocol (IGRP) is a distance-vector routing protocol developed by Cisco Systems in the 1980s. It was designed to ...
Read MoreDifference between SFTP and SCP
The file transfer protocols SFTP and SCP are used to safely send files between computers over a network. While these protocols provide comparable functions, there are some key differences between them. SCP (Secure Copy) is a simple file transfer protocol that is commonly seen on UNIX systems. SFTP (SSH File Transfer Protocol) is a more advanced SSH-based file transfer protocol that offers additional features for remote file management. SFTP vs SCP — Secure File Transfer Protocols SFTP • Interactive file management • ...
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