What is Simple Network Management Protocol (SNMP)?


Introduction

Simple Network Management Protocol (SNMP) allows network administrators to manage network performance, find and solve network problems.

SNMP messages are sent via User Datagram Protocol (UDP). By default, UDP port 161 is used to listen SNMP messages and Port 162 is used to listen SNMP traps.

SNMP Versions

Following are the versions of SNMP.

  • SNMP Version 1
  • SNMP Version 2
  • SNMP Version 3

SNMPv3 is the most secure version.

What is a Security Policy?


Introduction

The first step any organization should take to protect its data and itself from any liability is to develop a security policy. The purpose of a security policy is to notify the staff, managers and users about their responsibility to protect technical and informational resources.

Definition of Security Policy

” A Security Policy is a set of objectives for the company, rules of behavior for users and administrators and requirements for system and management that collectively ensures the security of network and computer system in an organization”.

What is Border Gateway Protocol (BGP)?


Introduction

BGP is used to exchange routing information between multiple Autonomous Systems (AS). BGP is used by ISP and large enterprises to advertise IP routes to one another. It runs on TCP port 179.

To run BGP, you must have the following things.

  • A Router with at least 512 MB of RAM.
  • An IOS image that supports BGP.
  • An Autonomous System Number.

Types of BGP

There are two types of BGP.

  • Internal BGP
  • External BGP