A firewall is a network security device that monitors incoming and outgoing network traffic and permits or blocks data packets based on a set of security rules. Its purpose is to establish a barrier between your internal network and incoming traffic from external sources (such as the internet) to block ... Read More

A firewall is a network security tool that monitors incoming and outgoing network traffic and determines whether to allow or block definite traffic based on a defined collection of security rules.The primary purpose is to enable non-threatening traffic and avoid malicious or unwanted data traffic for protecting the system from ... Read More

VLAN stands for Virtual LAN. It is a logical grouping of network devices. When we create VLAN, we break the large broadcast domain into smaller broadcast domains. Consider VLAN as a subnet. The same as two different subnets cannot communicate without a router, and different VLANs also require the router ... Read More

MIB stands for Management Information Base. It is a hierarchical virtual database of network (or other entity) objects describing a device being monitored by a network management system (NMS). A MIB can be used by Simple Network Management Protocol (SNMP) and remote monitoring 1 (RMON1).The MIB database of objects is ... Read More

SMI stands for Structure of Management Information. It defines the rules for describing managed objects. In the SNMP framework, managed objects reside in a virtual database called the management information base (MIB). Collection of related objects are defined in MIB modules. The modules are written using a subset of abstract ... Read More

The manager sends a request to an agent, and the agent responds to the request, known as Request/Response interaction. The request is usually used to retrieve or modify management information associated with the network device.Requests which are generated by the manager can be as follows −Get request-PDU − In this ... Read More

SNMP stands for Simple Network Management Protocol. It is an Internet-standard protocol for handling devices on IP networks. Devices that typically provide SNMP include routers, switches, servers, workstations, printers, modem racks, and more. It is used mainly in the network management framework to monitor network-attached computers for conditions requiring regulatory ... Read More

Network Management involves monitoring and controlling a network system so that it can operate properly without downtime. So, the function performed by a network management system are categorised as follows −Fault managementFault management is the procedure of technology used to manage the administrator who prevents faults within a networked system ... Read More

Network management is the procedure of administering, managing and working a data network using a network management system. Current network management systems use software and hardware to constantly collect and analyse data and push out configuration changes for increasing performance, reliability, and security.It involves configuring monitoring and possibly reconfiguring components ... Read More

POP stands for Post Office Protocol. It provides a standard mechanism for retrieving emails from a remote server for a mail recipient. For instance, suppose that a home user A usually connects to the Internet using a dial-up connection to an ISP.Suppose that another person, B, has sent an e-mail ... Read More