What is the evolution of WWW?
The WWW was introduced and originated by a contractor named Tim Berners-Lee who worked with the European Organization for Nuclear Research developed Enquire-a rudimentary hypertext program. This program was designed in a way in order to make information readily available to users.
When was the World Wide Web first introduced to the public?
A
What does host 0.0 0.0 mean?
In Internet Protocol version 4, the address 0.0. 0.0 is a non-routable meta-address used to designate an invalid, unknown, or non applicable target. In the context of routing, 0.0. 0.0 usually means the default route, i.e. the route which leads to ‘the rest of’ the Internet instead of somewhere on the local network.
What is the purpose of 127.0 0.0 IP address?
Network 127.0. 0.0 is reserved for IP traffic local to your host. Usually, address 127.0. 0.1 will be assigned to a special interface on your host, the loopback interface, which acts like a closed circuit.
Why is Ping loopback address?
In a TCP/IP network, the loopback IP address is 127.0. 0.1, and pinging this address will always return a reply unless the firewall prevents it. The loopback address allows a network administrator to treat the local machine as if it were a remote machine.
Why is 127 called loopback address?
The class A network number 127 is assigned the “loopback” function, that is, a datagram sent by a higher level protocol to a network 127 address should loop back inside the host. No datagram “sent” to a network 127 address should ever appear on any network anywhere.
What is the 0.0 0.0 IP address?
In the Internet Protocol Version 4, the address 0.0. 0.0 is a non-routable meta-address used to designate an invalid, unknown or non-applicable target. This address is assigned specific meanings in a number of contexts, such as on clients or on servers.
How many loopback addresses are there?
IPv4 network standards reserve the entire address block 127.0. 0.0/8 (more than 16 million addresses) for loopback purposes.
Should I use 127.0 0.1 or localhost?
# localhost name resolution is handled within DNS itself. localhost is also called local, usually referred as the local machine, while 127.0. 0.1 is usually considered as local address. It’s very important to know that it will not go through network card when using localhost while it will when using 127.0.
Why loopback address is used in router?
Loopback interface’s IP Address determines a router’s OSPF Router ID. A loopback interface is always up and allows Border Gateway Protocol (BGP) neighborship between two routers to stay up even if one of the outbound physical interface connected between the routers is down.
What is a Class B IP address?
and a Class A network can be divided into 128 different networks. Class B IP addresses are used for medium and large-sized networks in enterprises and organizations. They support up to 65,000 hosts on 16,000 individual networks. Class C addresses are most common and used in small business and home networks.
What is class B private address?
Class B: 172.16. 0.0 to 172.31. 255.255. Class C: 192.168.
What is class full IP address?
The class of IP address is used to determine the bits used for network ID and host ID and the number of total networks and hosts possible in that particular class. Each ISP or network administrator assigns IP address to each device that is connected to its network.
What is a class B subnet?
In a Class B address, the first two octets are the network portion, so the Class B example in Figure 1 has a major network address of 128.0. 0.0 – 191.255. 255.255. Octets 3 and 4 (16 bits) are for local subnets and hosts. Class B addresses are used for networks that have between 256 and 65534 hosts.
How do you get a class B subnet?
For the fourth octet, the mask would be 256-128=128, which is one subnet if it is used. However, if you turn the subnet bit off, the value is 0. This means that for every subnet in the third octet, the fourth octet has two subnets: 0 and 128, for example 1.0 and 1.128….Subnetting a Class B network address.
| Subnet | 64.0 | 128.0 |
|---|---|---|
| broadcast | 127.255 | 191.255 |
How many subnets are there in Class B?
If we include three bits to the network part from the host part, the default subnet mask of Class B network 255.255. 0.0 is changed into 255.255. 224.0. The three bits added to network part can have eight possible values in the third octet.