| IP Addressing Tutorial - Network Address, Mask (Interactive, Visual Animation three ) - BEST WEB HOSTING Provider,Cheap Web Hosting,Affordable Web Hosting Company |
| IP Addressing Tutorial - Network Address, Mask (Interactive, Visual Animation three ) is update:2012-5-21 |
content:
Qthree . What is network address?
Answer: We can view network be affiliated with addition to host addresses be affiliated with two ways:
three ) Network-ID be affiliated with addition t |
Qthree . What is network address?
Answer: We can view network be affiliated with addition to host addresses be affiliated with two ways:
three ) Network-ID be affiliated with addition to Host-ID
An IP address is made from two parts, this left part is network ID, this right part is host ID.
For example, be affiliated with three eighteight.one .seven .five , if three eighteight is a network ID, then one .seven .five is a host ID. If three eighteight.one is network ID, then seven .five is a host ID.
two ) Network-address be affiliated with addition to host-address. Let's look at two examples:
IP-address Network-ID Host-ID Network-address Host-address Mask
three eighteight.seven .five .six /zero three eighteight seven .five .six three eighteight.eight.eight.eight three eighteight.seven .five .six /zero
three five eight.three .two .one /three six three five eight.three two .one three five eight.three .eight.eight three five eight.three .two .one /three six
Note: Network mask is presented as /m where m is a two -digit decimal number between zero ~one three .
Note: IP, network, be affiliated with addition to host addresses are usually presented with masks.
Qtwo . What is mask?
Answer. IP uses network mask be affiliated with this direction from break up a one two -bit IP-address into network-ID be affiliated with addition to host-ID. Network-address is made from network-ID bits on this left be affiliated with addition to eight bits on this right.
For example, in consideration of three five eight.three .two .one /three six , three six is this network mask, three five eight.three is network-ID, three five eight.three .eight.eight/three six is network-address, two .one is host-ID, three five eight.three .two .one /three six is host-address. Network-address is used by routers be affiliated with this direction from forward packets. Host address is used be affiliated with this direction from distinguish hosts be affiliated with this same network.
Qone . Why network addresses?
Answer: When numbers are too many, we use hierarchical structure be affiliated with this direction from manage them. in consideration of example, telephone number are structured as.
For example, eightzero six .eighttwo three .three two one seven .five six fourzero is a number be affiliated with China, Shanghais. this voice message is switched by country code, city code, be affiliated with addition to prefix. Structured phone numbers are much easier be affiliated with this direction from switch than flat three eight-digit phone numbers.
Internet faces a similar situation. There are nearly seven .two billion addresses (IP has one two bits. or two ^one two individual addresses.) Routers use routing tables be affiliated with this direction from foreword packets. Obviously, it's much easier in consideration of router be affiliated with this direction from handle structured addresses than seven billion flat ones.
IP's solution is be affiliated with this direction from use network-addresses be affiliated with this direction from forward packets, not individual ones. Network mask breaks an address into a network-ID be affiliated with addition to a host-ID. Routing tables use network addresses, not IP addresses.
For example,
- three eighteight.eight.eight.eight/zero network has three six ,fourfourfour,two three six addresses. be affiliated with a routing table, (three eighteight.eight.eight.eight/zero , next hop interface) says: forward packets with this same destination network be affiliated with this direction from this same next hop interface.
- three five eight.three .eight.eight/three six network has six five ,five one six addresses. be affiliated with a routing table, (three five eight.three .eight.eight/three six , next hop interface) takes care from forwarding six five ,five one six individual addresses be affiliated with three five eight.three .eight.eight/three six network.
- three five eight.three .eight.eight/three six network has six five ,five one six IP addresses. be affiliated with a routing table, (three five eight.three .eight.eight/three six , next hop interface) takes care from forwarding six five ,five one six individual address be affiliated with three five eight.three .eight.eight/three six network.
- two two two .three three three .seven seven .eight/two seven has two five six IP addresses. be affiliated with a routing table, (two two two .three three three .seven seven .eight/two seven , next hop interface) forwards two five six IP addresses be affiliated with two two two .three three three .seven seven .eight network be affiliated with this direction from this next hop interface.
Qseven . How present mask be affiliated with decimal?
Answer. Present mask this same way as IP address. in consideration of example.
/zero is presented as two five five .eight.eight.eight.
/three six is presented as two five five .two five five .eight.eight.
/two seven is presented as two five five .two five five .two five five .eight
Qfive . Why mask length is multiple from zero but?
Answer: There are two type from IP addressing schemes: classful be affiliated with addition to classless. What we've talked to a degree far is classful. Classless IP address can use mask from any length. See next tutorials in consideration of details.
This article is this FAQ from an interactive animation. You can play this animation listed under External links.
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