DISCUSSION ON: Addressing: IP addressing, Subnetting, NAT, Routing: techniques, static vs. dynamic routing, Unicast Routing Protocols: RIP, OSPF, BGP; Other Protocols: ARP, RARP, IP, ICMP, IPv6; VPN. First Address of Address Block The first address in the block can be found by setting the rightmost 32 − n bits to 0s. EXAMPLE A block of addresses is granted to a small organization. We know that one of the addresses is 205.16.37.39/28. What is the first address in the block? The binary representation of the given address is 11001101 00010000 00100101 00100111 If we set 32−28 rightmost bits to 0, we get 11001101 00010000 00100101 0010000 or 205.16.37.32. Last Address of Address Block The last address in the block can be found by setting the rightmost 32 − n bits to 1s. EXAMPLE A block of addresses is granted to a small organization. We know that one of the addresses is 205.16.37.39/28. What is the last address in the block? The binary representation ...
PRESENTATION DOMAIN NAME SYSTEM Each domain name has a corresponding IP address When the user types the domain name in the address bar, the corresponding IP address is supplied. Such a translation is possible with the help of system called DNS (DOMAIN NAME SYSTEM) DEFINITION: “DOMAIN NAME SYSTEM is a collection of the databases that contain information about domain names and their corresponding IP address.” PURPOSE OF NAMING Addresses are used to locate objects Names are easier to remember than numbers You would like to get to the address or other objects using a name DNS provides a mapping from names to resources of several types DOMAIN NAME Domain name is a way to identify and locate computers connected to internet No two organizations can have same domain name A domain name always consists of two or more components separated by periods called dots (.) EXAMPLE: www.yahoo.co.in, www.facebook.com etc....
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