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    • DHCP Scope

      DHCP Scope

      A DHCP scope is a valid range of IP addresses that are available for assignment or lease to client computers on a particular subnet. In a DHCP server, a scope is configured to determine the address pool of IPs that the server can provide to DHCP clients. Scopes determine which IP addresses are provided to

    • Cat 6

      Cat 6

      Cat 6 (Category 6) is a cable standard used mainly for Ethernet computer networking, security systems, and telephone services. Cat 6 cable is backward compatible with the Cat 5, Cat 5E, and Cat 3 cable standards. Category 6 cable is capable of transmitting voice and data up to 155 Mbps (mega bits per second), with

    • What is Intersymbol Interference?

      What is Intersymbol Interference?

      Intersymbol interference is a signal distortion in telecommunication. One or more symbols can interfere with other symbols causing noise or a less reliable signal. The main causes of intersymbol interference are multipath propagation or non-linear frequency in channels. This has the effect of a blur or mixture of symbols, which can reduce signal clarity. If

    • How to Find DNS Servers

      How to Find DNS Servers

      The easiest way to find DNS servers is by using the ‘nslookup’ tool. Start nslookup Set the search type to NS. This tells nslookup to search for nameservers Finally, enter the domain name for the nameservers being searched for Here are some search examples for the most popular searches: Finding the Lincsat DNS Servers $

    • What is a QSIG?

      What is a QSIG?

      QSIG is a signaling protocol that isĀ  based on ISDN. It communicates signals between private branch exchanges (PBXs) within a Private Integrated Services Network (PISN) using the application-level ROSE and connection-level Q9.31 protocols. QSIG uses ISDN as the physical link layer in the exchanges and is often used in enterprise voice or integrated service networks.

    • How to Network Two Computers

      How to Network Two Computers

      Computers are the basis for both modern technology and modern society. The world of today thrives on information and getting that information from one place to another is crucial to survival. Even in one’s own home, multiple computers must be able to communicate with one another and other devices. This may seem like a daunting

    • How to Block an IP Address

      How to Block an IP Address

      An IP address is the numeric label or sequence of numbers that is assigned to a computer or device used on the Internet or a local area network. It is a means of identification and determining the user's address online. When an IP address is blocked, network connections to or from that address are not

    • Understanding Data Encapsulation

      Understanding Data Encapsulation

      The sending and receiving of data from a source device to the destination device is possible with the help of networking protocols when data encapsulation is used. The data is encapsulated with protocol information at each OSI reference model layer when a host transmits data to another device across a network. Each layer communicates with

    • Understanding Frame Relay

      Understanding Frame Relay

      Frame Relay is a protocol for transmitting data over a wide area network (WAN). It was designed to use across ISDN interfaces but it is now used over an assortment of other network interfaces. Once one becomes a master of frame relay design and configuration, it is much easier to obtain a strong understanding of

    • VoIP Security

      VoIP Security

      Any technology that involves transfer of data or information is prone to compromised security. It happens with telephones, cell phones, email and Internet transactions. Because VoIP (Voice Over Internet Protocol) has the Internet as its mode of transference it’s possible to have your Internet-based called intercepted. To make matters worse, there are techno-troublemakers who are

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