Category: Networking

Time-to-live (TTL) is a value in an Internet Protocol (IP) packet that tells a network router whether or not the packet has been in the network too long and should be discarded. For a...

Virtual Local Area Network, Virtual LAN or VLAN are network of computers that behave as if they are connected to the same wire even though they may actually be physically located on different segments...

DoS attack, denial-of-service attack, is an explicit attempt to make a computer resource unavailable by either injecting a computer virus or flooding the network with useless traffic. There are two types of DoS attacks:...

Proxy server is a computer that sits between a client computer and a real server, and provide indirect network services to a client. A proxy server intercepts all client requests, and provide responses from...

Ipconfig is a MS-DOS command-line tool used to display and manage the network settings of your computer. Ipconfig is available on Windows machines, and it displays the current network connection details and DHCP client...

DHCP stands for (Dynamic Host Configuration Protocol).   DHCP, Dynamic Host Configuration Protocol, is a communications protocol that dynamically assigns unique IP addresses to network devices. As a network device joins or leaves an...

TCP/IP, Transmission Control Protocol/Internet Protocol, is a suite of communications protocols used to interconnect network devices on the Internet. TCP/IP implements layers of protocol stacks, and each layer provides a well-defined network services to...

MAC, Media Access Control, address is a globally unique identifier assigned to network devices, and therefore it is often referred to as hardware or physical address. MAC addresses are 6-byte (48-bits) in length, and...

Here is another scenario where subnetting is needed. Pretend that a web host with a Class C network needs to divide the network so that parts of the network can be leased to its...

An IP address has two components, the network address and the host address. A subnet mask separates the IP address into the network and host addresses (). Subnetting further divides the host part of...

The loopback IP address is the address used to access itself. The IPv4 designated 127.0.0.1 as the loopback address with the 255.0.0.0 subnet mask. A loopback interface is also known as a virtual IP,...

In order to maintain uniqueness within global namespace, the IP addresses are publicly registered with the Network Information Center (NIC) to avoid address conflicts. Devices that need to be publicly identified such as web...

Internet Protocol Address (or IP Address) is an unique address that computing devices use to identify itself and communicate with other devices in the Internet Protocol network. Any device connected to the IP network...