IP Classes

Class A:

Class A addresses are specified to networks with large number of total hosts. Class A allows for 126 networks by using the first octet for the network ID. The first bit in this octet, is always set and fixed to zero. And next seven bits in the octet is all set to one, which then complete network ID. The 24 bits in the remaining octets represent the hosts ID, allowing 126 networks and approximately 17 million hosts per network. Class A network number values begin at 1 and end at 127.

Class B:

Class B addresses are specified to medium to large sized of networks. Class B allows for 16,384 networks by using the first two octets for the network ID. The two bits in the first octet are always set and fixed to 1 0. The remaining 6 bits, together with the next octet, complete network ID. The 16 bits in the third and fourth octet represent host ID, allowing for approximately 65,000 hosts per network. Class B network number values begin at 128 and end at 191.

Class C:

Class C addresses are used in small local area networks (LANs). Class C allows for approximately 2 million networks by using the first three octets for the network ID. In class C address three bits are always set and fixed to 1 1 0. And in the first three octets 21 bits complete the total network ID. The 8 bits of the last octet represent the host ID allowing for 254 hosts per one network. Class C network number values begin at 192 and end at 223.

Class D and E:

Classes D and E are not allocated to hosts. Class D addresses are used for multicasting, and class E addresses are not available for general use: they are reserved for future purposes.

Juniper Routers >>>

Juniper Routers

Juniper is a leading provider of core routing, edge routing and network security solutions for IP-based enterprise and carrier-class networks. Network Hardware Resale was one of the first to offer pre-owned, refurbished and used Juniper equipment and maintains the capital and resources to carry the largest inventory of second-hand Juniper product available on the market. Popular items include the:

• Juniper M5 Series Routers
• Juniper M10 Series Routers
• Juniper M20 Series Routers
• Juniper M40 Series Routers
• Juniper M160 Series Routers
• Juniper T320 Series Routers

Canopy Antenna >>>

Motorola Canopy Antenna

Motorola Canopy systems are total broadband access solutions designed for extending networks wirelessly to provide broadband services to virtually any customer in virtually any environment. These systems provide wireless Ethernet connections which can be used to transport voice, video and data in channelized or unchannelized formats. Modules are available to support Line of Sight and Non-Line of Sight point-to-point links and point-to-multipoint last mile access solutions. With a broad array of Backhaul, Access Points and Subscriber Modules, these systems can be configured to meet the current and future needs of business and residential network users.

DESCRIPTION:

• 900 MHz, 2.4, 5.1, 5.2, 5.4, 5.7 and 5.9 GHz • Point-to-Multipoint • up to 21 Mbps (aggregate data rates). • 128-bit encryption for security

Patch Panel >>>

Patch Panel

A patch panel or patch bay is a panel, typically rackmounted, that houses cable connections. One typically shorter patch cable will plug into the front side, whereas the back holds the connection of a much longer and more permanent cable. The assembly of hardware is arranged so that a number of circuits, usually of the same or similar type, appear on jacks for monitoring, interconnecting, and testing circuits in a convenient, flexible manner.

Patch panels offer the convenience of allowing technicians to quickly change the path of select signals, without the expense of dedicated switching equipment. This was first used by early telephone exchanges, where the telephone switchboard (a massive array of patch panels) and a large room full of telephone operators running it was ubiquitous.

Information outlet >>>

Information outlet Image

In a telephone wiring system in a building, a connection device designed for a fixed location (usually on a wall) in which telephone wiring terminates; the outlet contains a female jack to receive a male plug that is inserted into it. Such outlets are used to connect a telephone, FAX, telephone answering machine, etc., to a telephone line.

Difference between Router and Switch >>>

ROUTER
A router is a device or, in some cases, software in a computer,

that determines the next network point to which a packet
should be forwarded toward its destination.
The router is connected to at least two networks and
decides which way to send each information packet based
on its current understanding of the state of the
networks it is connected to.
SWITCH
While the network switches are capable of inspecting
data packets as they are received, determining the
source and destination device of each packet,
and forwarding them appropriately.

Conclusion..

For me, router and switch is related to each other
because routers allow several switches to be
connected to them, as a means to expand
the local network to accommodate
more Ethernet devices.