ccna 200-301 network simulator tools plus

ccna 200-301 network simulator tools plus.An IP address is used to identify a communicating entity in a network, such as a host, or a port on a router. And all packets transmitted in an IP protocol-based network must also be identified using an IP address, just as we write a letter with the mailing address of the recipient and the address of the sender, by which the postal worker decides where the mail will go.In a computer network, each packet being transmitted also has to include a source IP address and a destination IP address. These two addresses are to remain constant as that packet is transmitted across the network (with the exception of network address translation and proxies, which are described later in this book) to ensure that network devices always send packets from the source communication entity to the designated destination communication entity, and packets from the destination communication entity back to the source communication entity, based on the determined IP address.Before you begin to introduce IP, first look at what parameters in the TCP/IP properties an Internet host needs to configure Open the aInternet Protocol(TCP/IP) Properties window, as shown in Figure 2-5-1, an Internet host generally needs to configure the IP address, netmask, default gateway, DNS server address, and other parameters. As described earlier, DNS servers are used for domain name resolution, and are responsible for resolving domain names into corresponding IP addresses, but what are the main roles of IP addresses, subnet masks, default gateways, and other parameters? This section will explain the use of these parameters in detail.2.5.1 Binary and Decimal Conversions**.IP addresses use a 32-bit binary number format, which is usually represented by a dot-separated decimal number for ease of memory, e.g., the IP address 202.119.248.65 corresponds to the binary number Figure 2-5-1 -internet protocol (TCP/IP)11001010.01110111.111111000.010000019 T Explanation The first step of the "Properties of IP Addresses" configuration window is to master the conversion between binary and decimal.37Chapter 2 Network Interconnection and Reference Models*" 02