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OpManager - Network Monitoring & Management
Defending your client's network from faulty configuration changes, poor compliance, and bringing the network back quickly from downtime can be challenging. It requires a lot of effort and time, a fai…
Routing
Distance Vector routing protocols use frequent broadcasts (255.255.255.255 or FF:FF:FF:FF) of their entire routing table every 30 sec. on all their interfaces in order to communicate with their neigh…
Network Cabling
This article covers the popular serial ports on workstations, servers and laptop computers. We cover serial data transfer, port pinouts, port speeds, serial interface types (DB9 & DB25), null mod…
Network Fundamentals
The first step in controlling broadcast and multicast traffic is to identify which devices are involved in a broadcast or multicast storm. The following protocols can send broadcast or multicast pack…
Network Fundamentals
Power over Ethernet (PoE) was invented by PowerDsine back in 1997 and the first power injector (Midspan) was installed in 1998! Many manufacturespartnered with PowerDsine to make useof this innovatio…
Network Fundamentals
A network is simply a group of two or more Personal Computers linked together. Many types of networks exist, but the most common types of networks are Local-Area Networks (LANs), and Wide-Area Networ…
Windows Servers
Windows 2003 Group Policies allow the administrators to manage a group of people accessing a resource efficiently. The group policies can be used to control both the users and computers. They give b…
Cisco Routers
Router-on-a-stick is a term frequently used to describe a setup up that consists of a router and switch connected using one Ethernet link configured as an 802.1q trunk link. In this setup, the switch…
Ethernet Protocol, CSMA/CD, Collisions
The device driver software receives a frame of IP, IPX, NetBIOS, or other higher-layer protocol data. From this data, the device driver constructs a frame, with appropriate Ethernet header informatio…
SASE & SD-WAN Networks
A lot has changed in how people work during the past twenty years. Co-working spaces, mobility, and the cloud now are common. Businesses are spread out and branch offices are empowered. This new fun…
Network Protocol Analyzers
This article explains how to detect a SYN Flood Attack using an advanced protocol analyser like Colasoft Capsa. We’ll show you how to identify and inspect abnormal traffic spikes, drill into captured…
Supernetting & CIDR
Our previous article served as an introduction to Supernetting, also known as Route Summarization. We covered the concept of Supernetting, how it works, its advantages and more. This article will att…

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