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  • Data Link Layer

    • VLAN Hopping

      VLAN Hopping

      VLAN Hopping is one of the primary VLAN based attacks used by hackers to infiltrate network security. VLAN hopping is used to attack a network by sending packets to a port which is generally not accessible. VLAN hopping attacks are mainly conducted in the Dynamic Trunking Protocol and, in some cases; the attacks are targeted

    • 802.1p

      802.1p

      802.1p is an IEEE standard that describes mechanisms to prioritize traffic and perform dynamic multicast filtering. Because of its support for priority specification, 802.1p is important for providing Quality of Service (QoS) for better reliability and quality. Quality of Service QoS is a mechanism that allows for better handling of data that passes over a

    • Ethernet

      Ethernet

      Ethernet is the most common LAN (Local Area Network) technology in use today. Xerox developed Ethernet in the 1970s, and became popular after Digital Equipment Corporation and Intel joined Xerox in developing the Ethernet standard in 1980. Ethernet was officially accepted as IEEE standard 802.3 in 1985. The term “Ethernet” is now used to refer

    • Differences Between ISDN and DSL

      Differences Between ISDN and DSL

      Definitions Integrated Services Digital Network (ISDN): ISDN is a digital transmission system, which is used to transmit voice and data through copper telephone wires. In other words, it's a circuit-switched data transmission system that is used for voice and data transmission over the wire. Digital Subscriber Line (DSL): DSL is also a digital transmission system

    • What is VDSL2?

      What is VDSL2?

      VDSL2 is an acronym which stands for Very High Bit Rate Digital Subscriber Line Generation 2. This is based on of the original Very High Bit Rate Digital Subscriber Line (VDSL) but runs on a different frequency (30 MHz) over 7 different bands to produce extremely high bandwidth capabilities. The service for VDSL2 is available

    • 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

    • ISDN BRI

      ISDN BRI

      ISDN BRI (Basic Rate Interface) is a standard Integrated Services Digital Network (ISDN) service meant for residential and small scale business Internet connections. There is another type of ISDN configuration called the Primary Rate Interface (PRI) that is designed to provide higher bandwidth. The BRI configuration defined in the physical layer standard I.430 produced by

    • Ethernet Switch

      Ethernet Switch

      A switch is something that is used to turn various electronic devices on or off. However, in computer networking, a switch is used to connect multiple computers with each other. Since it is an external device it becomes part of the hardware peripherals used in the operation of a computer system. This connection is done

    • PPP (Point-to-Point Protocol)

      PPP (Point-to-Point Protocol)

      PPP (Point-to-Point Protocol) is the most widely used method for transporting IP packets over a serial link between the user and the Internet Service Provider (ISP). Although PPP is primarily used over dialup lines, variants such as PPoE (PPP over Ethernet) and PPoA (PPP over ATM) extend PPP to new data-link layer protocols. PPP was

    • PPP Authentication Protocols

      PPP Authentication Protocols

      Windows Server 2003 and Windows XP support the following PPP authentication protocols: PAP or Password Authentication Protocol The oldest forms of authentication schemes used where the user credential are sent in plain text. This is not the securest form of passing authentication credentials as anybody can use a third party sniffer program and capture these

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