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- IBM Global Network serves the networking needs of several hundred large global companies, tens of thousands of mid-sized businesses and more than 1 million individual Internet users in 59 countries. The network has more than 1,300 dial-up points of presence and dedicated access from 850 cities in 59 countries.
- IBM LOGO Let's connect! Stay connected by joining our Talent Network. Tell us more about yourself and we'll keep you up to date regarding upcoming events and career opportunities that match your interests.
- The IBM PC Network Baseband Adapter (#1221) is a feature card for connecting the new IBM Personal System/2 (TM) Model 30 and IBM Personal Computers to the baseband IBM PC Network.
- IBM divested itself of low margin industries (DRAM, IBM Network, personal printers, and hard drives). The company regained the business initiative by building upon the decision to keep the company whole – it unleashed a global services business that rapidly rose to become a leading technology integrator.
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The IBM PC Network was IBM PC's first LAN system. It consisted of network cards, cables, and a small device driver known as NetBIOS (Network Basic Input/Output System). It used a data rate of 2 Mbit/s and carrier-sense multiple access with collision detection.
NetBIOS was developed by Sytek Inc as an API for software communication over this IBM PC Network LAN technology; with Sytek networking protocols being used for communication over the wire. IBM's later Token Ring network emulated the NetBIOS application programming interface, and it lived on in many later systems.
A Virtual Local Area Network (VLAN) is a network construct that makes it possible to create broadcast domains at the OSI Model layer-2 level. IBM Cloud uses VLANs to isolate broadcast traffic, to provide packet identification, and to let multiple workloads coexist on the same physical equipment.
The original broadband version in 1984 communicated over 75 Ω cable television compatible co-axial cable with each card connecting via a single F connector. Separate transmit and receive frequencies were used. Cards could be ordered that used different frequencies so multiple cards could transmit simultaneously, at 2 Mbit/s each. A Sytek head-end device was required to translate from each card's transmit frequency to the destination card's receive frequency. Frequency-division multiplexing allowed the cable to be shared with other voice, video, and data traffic.
Later, in 1987 a much cheaper 'baseband' version, also running at 2 Mbit/s connected computers in daisy-chain style using twisted-pair cables with 6P2C modular telephone connectors (often mistermed 'RJ11'). Interface cards had two 6P2C sockets for connecting to left and right neighbor nodes. The unused sockets at the ends of the network segment had to be fitted with a terminator on one end of the chain and a wrap plug on the other. Koninklijke gazelle n.v driver download. A hybrid star topology was possible using a hub.
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- ^IBM. PC Network Announcement Letter. 1984-08-14 ().
- ^IBM. PC Network Program Announcement Letter. 1985-04-02 ().
- ^'Resolution Problems, Network World 22 Jun 1987