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was just looking on youtube....<br />
it says &nbsp;class D uses first 4 bits 1110... &nbsp;which means 224 and 1111 is 240
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was just looking on youtube....
it says  class D uses first 4 bits 1110...  which means 224 and 1111 is 240

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That's what my links say also.
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I have seen online , where they mention Class D:<br />
CIDR block 224.0.0.0/4 <br />
Range: Network - Broadcast &nbsp;224.0.0.0 - 239.255.255.255 <br />
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I am not sure why it goes from 224 to 239. How did they come up with it ? since it is /4 as notation?<br />
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<br />
On this link: <a href="http://ipduh.com/ip/cidr/?224.0.0.0/4" rel="ugc">http://ipduh.com/ip/cidr/?224.0.0.0/4</a>.<br />
they even say Netmask = 240.0.0.0<br />
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Confusing to me <br />
<br />
Thank you
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I have seen online , where they mention Class D:
CIDR block 224.0.0.0/4 
Range: Network - Broadcast  224.0.0.0 - 239.255.255.255 

I am not sure why it goes from 224 to 239. How did they come up with it ? since it is /4 as notation?


On this link: http://ipduh.com/ip/cidr/?224.0.0.0/4.
they even say Netmask = 240.0.0.0

Confusing to me 

Thank you

Class D subnets

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.

Routers

A switch is a device that filters and forwards packets of data between LAN segments. Switches operate at the data link layer or the network layer of the Open Systems Interconnection (OSI) Reference Model and therefore support any packet protocol. LANs that use switches to join segments are called switched LANs or, in the case of Ethernet networks, switched Ethernet LANs. A hub is a connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports; when a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.