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29 Cards in this Set
- Front
- Back
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First layer of the OSI Model. Protocols at the Physical layer accept frames from the Data Link Layer and generate voltage so as to transmit signals. pg 55
Amplitude-a measure of a waves strength at any given point in time |
physical layer
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How Bits together form a byte and how pieces of information does one byte carry
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8 and 1
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When signals only travel in one direction.
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simplex
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A form of transmission that allows multiple signals to travel simultaneously over one medium.
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multiplexing
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a data transmission involves only one transmitter and one receiver
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point to point
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loss of a signals strength as it travels away from its source.
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Attenuation
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Consists of color-coded pairs of insulated copper wires, each with a diameter of 0.4 to 0.8mm.
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twisted pair cable
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Consists of twisted wire pairs that are not only individually insulated, but also surrounded by a shielding made of a metallic substance such as foil
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shielded twisted pair cable
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a patch cable in which the termination locations of the transmit and receive wires on one end of the cable are reversed.
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crossover cable
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Networks that transmit signals through the atmosphere via infared or radiofrequency waves.
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wireless networks
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geographical area that an antenna or wireless system can reach.
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range
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A type of data transmission in which infrared light signals are used to transmit data through space, similar to the way a television remote control sends signals across the room.
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infrared
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A rule that governs how networks communicate.
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protocol
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Operates in the Transport layer of the OSI Model and provides reliable data delivery services
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TCP-transmission core protocol
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a network layer protocol that reports on the success or failure of data delivery.
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ICMP-Internet control message protocol
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a Network layer protocol that obtains the MAC address of a host, or node, and then creates a database that maps the MAC address of another to the host’s address
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ARP-Address resolution protocol
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a 12 character string that uniquely identifies a network node. The manufacturer hard codes it into the NIC. Composed of the block ID and the Device ID
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Mac Address
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An IP address reserved for communicating from a node to itself. Is always cited as 127.0.0.1, although in fact, transmitting to any IP address whose first octet is 12 will contact the originating device.
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loopback address
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an automated means of assigning a unique IP address to every device on a network.
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dynamic host configuration protocol-dhcp
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provides a computer with an IP address automatically. It assigns the computers network adapter an IP address from a predefined pool of addresses.
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APIPA-Automatic Private IP Adressing
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In the range of 1024 to 49151. These are accessible to network users and processes that do not have special administrative privileges.
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registered ports
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in the range of 0 to 1023 and are assigned to processes that only the operating system or an administrator of the system can access.
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well known ports
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any hosts on the Internet that need to look up domain name information.
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resolvers
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an application layer protocol used to send and receive files via TCP/IP.
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FTP-File Transfer Protocol
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is a terminal emulation protocol used to log on to remote hosts using the TCP/IP protocol suite.
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Telnet
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utility that can verify that TCP/IP is installed, bound to the NIC, configured correctly, and communicating with the network.
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Ping-packet internet grouper
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a protocol originally designed for IBM to provide transport and session layer services for applications running on small, homogeneous networks.
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NetBIOS-Network Basic Input Output System
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Is the protocol suite originally designed to interconnect Macintosh computers
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Appletalk
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process of assigning one network component to work with another
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binding
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