SYN Flood A SYN flood is a type of denial of service (DoS) attack that sends a series of “SYN” messages to a computer, such as a web server. SYN is short for “synchronize” and is the first step in establishing communication between two systems over the TCP/IP protocol. When a server receives a SYN …
T1 Stands for “Transmission System Level 1.” A T1 line is a telecommunications line that supports 24 voice channels when used for telephone service, or a total bandwidth of 1.544 Mbps when used as an Internet connection. T1 lines typically operate over twisted pair copper wire, similar to a telephone wire, but can also run …
T3 Stands for “Transmission System Level 3.” A T3 line is a telecommunications standard that provides the equivalent bandwidth of 28 T1 lines, with 672 individual voice channels and 45 Mbps of Internet bandwidth. A T3 connection operates over a coax cable, but limited segments can also use a fiber optic cable. A T3 line …
Tag On clothes, tags usually indicate the brand, size of the garment, fabrics used, and the washing instructions. In Web pages, tags indicate what should be displayed on the screen when the page loads. Tags are the basic formatting tool used in HTML (hypertext markup language) and other markup languages, such as XML. For example, …
Telnet Telnet is a protocol for connecting from one computer to another using a text-based command line interface. Telnet connections can be made over a local network or over the Internet. Making a Telnet connection requires a client application on the local computer (where commands are typed) and a Telnet server running on the remote …
Traceroute Traceroute is a TCP/IP diagnostic utility that traces the route traveled by a data packet from one host to another. A traceroute report provides information about which networks a data packet traverses and how long each hop takes. If one node along a packet’s journey causes a delay or other network problem, a traceroute …
Trackback Trackback is a means of notifying a website that another website has linked to it. By linking to a trackback link, a webmaster can automatically inform the other website that he has added a link to one of site’s pages. However, in order for the trackback system to work, both websites must support trackback. …
Troll Trolls are typically thought of as scary creatures that live underneath bridges. While these mythical creatures may only exist in legend, “Internet trolls” are real and cause real problems. In computing, the term “troll” refers to a person who posts offensive, incendiary, or off topic comments online. These comments may appear in Web forums, …
Tumblr Tumblr is a microblogging website that allows you to create and follow blogs. Unlike traditional blogging websites, Tumblr encourages short posts, such as a single photo or a few sentences of text. The goal is to make blogging quick and easy, enabling users to post frequent updates. Tumblr is also more community-oriented than other …
Tunneling Tunneling is the process of transporting network traffic that uses one protocol within data packets using another protocol. It allows two devices to hide the nature of the data within the tunnel from other devices on the network. Tunneling protocols can encrypt traffic, provide a secure connection for a VPN, or allow packets using …