ï»¿ Introduction to Networking
IP router- A device that performs IP routing. A physical device with roles defined by the IP protocol, including to connect LANs and WANs using its physical interfaces, and to route (forward) IP packets that come in any interface out the correct outgoing interfaces.
IP address- A 32-bit binary number, often written in the DDN format, that hosts use as their unique identifier in a TCP/IP network, much like a postal mailing address in the postal system.
routing table- A list of IP routes used by an IP router when making routing decisions about where to forward ...view middle of the document...
Address Resolution Protocol (ARP) - A protocol that allows an IP host on a LAN to discover the MAC address of another host on the same LAN.
Router- Another term for IP router.
Interface- A generic word, usually used when also speaking of network layer topics and IP, that refers to a deviceâ€™s connection (interface) to the TCP/IP network. Logically, IP expects that an interface has an assigned IP address. The most common term used to describe the physical connectors on an IP router.
dotted-decimal notation (DDN)- The decimal format used for IP addresses, in which each set of 8 bits is represented by its decimal equivalent, with each of the four decimal numbers separated by a period (dot). The format used to write 32-bit IP addresses as decimal numbers.
static configuration- When working with networking devices, the process of connecting from a network engineerâ€™s computer to the network node and typing instructions that tell the node what to do.
dynamic routing protocol- Any protocol that defines the process and messages by which routers learn IP routing information over time, changing its routes based on changes to the network.
DNS Request The name of a message defined by the DNS protocol in which a DNS client lists the name of an IP host and a request for the DNS server to send back a DNS Reply with that hostâ€™s IP address.
DNS Reply- The name of a message defined by the DNS protocol in which a DNS server sends back the IP address used by a host, in response to a DNS Request message received from some DNS client.
IP address class- One of the five classes defined by the IP version 4 addressing rules, namely, class A, B, C, D, or E.
Classful IP addressing- A way to think about IP version 4 addressing in which the person uses IP address classes to classify addresses.
Unicast IP address- An IP address that represents a single interface connected to a TCP/IP network, which by definition comes from a class A, B, or C network.
Classful IP network- Another term for IP network, with emphasis on the fact that the IP network concept is based on classful IP addressing rules.
DNS server- Software running on some computer that acts in the DNS server role, per the DNS protocol, which means that the server keeps a list of names and corresponding IP addresses, ready to reply with that information to a DNS Request from any DNS client.
DNS client- Any computer whose software includes the DNS client function, which includes most computer operating systems today, with which the client can take the text name identified by the user and send a request to a DNS server, in an attempt to discover the other hostâ€™s IP address.
DHCP client- Any computer whose software includes the DHCP client function, which includes most computer operating systems today, with which the client asks a DHCP server for the use of an IP...