Checkpoint Tcp/Ip Plan Essay example

1353 WordsDec 24, 20126 Pages
CheckPoint TCP/IP LAN Plan 1, 2, 4, 11, 14, 15, 16, & 20 1. An IPv6 address is made up of how many bits? d. 128 IPv6 uses 128-bit hexadecimal addresses and has built-in security and QoS features. An IPv6 address is 128 bits rather than the 32 bits in an IPv4 address. This length increases the number of possible addresses from about 4 billion in IPv4 to 3.4 x 1038 addresses (that’s 34 followed by 37 zeros!) in IPv6. Unless IP addresses are assigned to every star in the universe, it’s safe to say enough IPv6 addresses will be available. Unlike IPv4 addresses, which are specified in dotted decimal notation in 8-bit sections, IPv6 addresses are specified in hexadecimal format in 16-bit sections separated by a colon, as in…show more content…
Each of the three main address classes has a default subnet mask that uses the decimal number 255 for each octet corresponding to the network ID. (The number 255 is 11111111 in binary and fills all eight bit positions in an IP address octet.) Therefore, the default Class A subnet mask is 255.0.0.0, the default Class B subnet mask is 255.255.0.0, and the default Class C subnet mask is 255.255.255.0. 4. Which of the following is a private IP address and can’t be routed across the Internet? b. 172.19.243.254 Because of the popularity of TCP/IP and the Internet, unique IP addresses to assign to Internet-accessible devices are almost exhausted. To help alleviate this problem, TCP/IP’s technical governing body reserved a series of addresses for private networks—that is, networks whose hosts can’t be accessed directly through the Internet. This nonprofit governing body, the Internet Engineering Task Force (IETF; www.ietf.org), is responsible for TCP/IP standards and characteristics. The reserved addresses are as follows: ● Class A addresses beginning with 10 (one Class A network address) ● Class B addresses from 172.16 to 172.31 (16 Class B network addresses) ● Class C addresses from 192.168.0 to 192.168.255 (256 Class C network addresses) The addresses in these ranges can’t be routed across the Internet, which is why any organization can use them to assign IP addresses to their internal hosts. IPv6

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