ICMP is the Internet Control Message Protocol. ICMP is a complementary protocol to IP (Internet Protocol). Like IP, ICMP resides on the Network Layer of the OSI Model. ICMP is designed for sending control and test messages across IP networks. Unlike the Transport Layer protocols TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) which …
The IP address is a logical address assigned to a network card in order to establish communication over the network and identify the computer over it. Network administrators usually assign IP addresses based on certain rules and regulations. Reasons to Change an IP Address Even if someone is part of a small network routed through …
Cisco is a leading manufacturer of networking devices such as modems, wireless routers, and network storage devices. Cisco products are sold worldwide to millions of consumers for both residential and commercial purposes. Cisco also markets a number of data plans for some of the largest Internet Service Providers in the world. What is 192.168.1.245? 192.168.1.245 …
The Unix/Linux `traceroute` command and the Microsoft Windows `tracert` commands both accomplish the task of tracing network paths, but they do it in slightly different ways. Both of these tools for tracing network routes send out a packet wth TTL (Time To Live) set to 1 and report it’s destnation. Then, they send out a …
A subnet mask allows users to identify which part of an IP address is reserved for the network and which part is available for host use. By looking at the IP address alone, especially now with classless inter-domain routing, users cannot tell which part of the address is which. Adding the subnet mask or netmask …
127.0.0.1 is the loopback Internet protocol (IP) address also referred to as the “localhost.” The address is used to establish an IP connection to the same machine or computer being used by the end-user. The same convention is defined for computer’s that support IPv6 addressing using the connotation of ::1. Establishing a connection using the …
An IP (or Internet Protocol) address conflict occurs when two different systems on the same subnet are assigned or otherwise have their network interface configured to use the same IP address. It is possible to have two systems on different subnets configured with the same IP address, but not have a conflict occur due to …
NAT (Network Address Translation) is a technique for preserving scarce Internet IP addresses. Why NAT? The current Internet uses IP addresses in the form xxx.xxx.xxx.xxx. A sample IP address might be 202.187.4.212. Because of the way these IP addresses are allocated, there started to be a shortage of available IP addresses. The current IP (Internet …
A routing table is a grouping of information stored on a networked computer or network router that includes a list of routes to various network destinations. The data is normally stored in a database table and in more advanced configurations includes performance metrics associated with the routes stored in the table. Additional information stored in …
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 …