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    • LDAP Security Issues

      LDAP Security Issues

      RFC 2829 – Authentication Methods for LDAP defines the basic threats to an LDAP directory service: Unauthorized access to data via data-fetching operations, Unauthorized access to reusable client authentication information by monitoring others' access, Unauthorized access to data by monitoring others' access, Unauthorized modification of data, Unauthorized modification of configuration, Unauthorized or excessive use of

    • What Port Number is XXX on?

      What Port Number is XXX on?

      The way that most services work under TCP/IP is that the server is configured to use a well known port number and the client connects from a random high port. Most of these well known ports are port numbers below 1,024. High ports are ports 1,024 or above. In the old days, ports below 1,024

    • How to Use PuTTY

      How to Use PuTTY

      PuTTY is an open source terminal emulation program that accesses Telnet, SSH, and other TCP protocols and acts as a serial client for computers. The letters “TTY” in the name PuTTY represent the terminal application in the Unix and Linux Operating Systems (OSs) and is also short for teletype. The PuTTY application was first written

    • Network Layer

      Network Layer

      The Network Layer is located at the 3rd position in the seven layer OSI model. It offers serviceable and practical ways of transmitting variable length data series from a source to a destination through one or more networks, while preserving the class of service and error handling tasks. The Network Layer is accountable for source

    • traceroute

      traceroute

      traceroute is a command which is used to trace the route of a packet through a TCP/IP network. traceroute is a Unix command. Under Microsoft Windows, the traceroute command has been renamed `tracert`. Unix `traceroute` and Microsoft Windows `tracert` are designed to accomplish the same task, but differ in the way they display output, in

    • Dynamic DNS

      Dynamic DNS

      Dynamic DNS is a technology that allows you to update the IP address of a domain in real time. In order to fully understand how Dynamic DNS works, it is important to first understand domain names and name servers. Essentially, all website domain names are held on computer servers known as name servers. These servers

    • 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

    • Ethernet Cable Pinout

      Ethernet Cable Pinout

      Ethernet cable connects a network interface card (NIC) with a hub or Ethernet switch. Ethernet cables can be purchased from a computer store. They come in two categories, flat and braided. The flat or solid cable is used when there is a need for a longer cable run. However, it is not flexible. Thus, its

    • VDSL (Very High Bit-Rate Digital Subscriber Line)

      VDSL (Very High Bit-Rate Digital Subscriber Line)

      Broadband has revolutionized the way we view and use the internet. The two main types of broadband technology that have pervaded the market are Asymmetric Digital Subscriber Line (ADSL) and cable modems. Both these technologies are a huge leap from the days of the 56 Kbps dial-up connections, with maximum speeds ranging between 8 to

    • LMDS (Local Multipoint Distribution Service)

      LMDS (Local Multipoint Distribution Service)

      LMDS (Local Multipoint Distribution Service) is a broadband wireless point-to-multipoint specification utilizing microwave communications. LMDS operates on FCC licensed frequencies. The FCC divided the United States into 493 BTA's (Basic Trading Areas) and auctioned the rights to transmit on the LMDS bands in each of those areas to LMDS service providers. Each BTA is licensed

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