By Niklaus Wirth
It is a vintage publication approximately uncomplicated algorithms and knowledge buildings. it is a should have e-book for knowing behind-the-scenes good judgment of normal libraries in sleek programming languages. can be on each programmer's learn record.
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Additional info for Algorithms + Data Structures = Programs (Prentice-Hall Series in Automatic Computation)
These types of errors, where a frame’s contents are corrupted during the transmission over the local media, are called CRC errors. Figure 1-5 illustrates the CRC operation. Upper Layer Data carried by the Data Link Layer 6 6 2 20 20 1460 4 Destination Addresss Source Address Etype (0800) IP (6) TCP Application Data CRC Network Layer Transport Layer Bytes Data Link Layer Upper Layer Data carried by the Data Link Layer 6 6 2 20 20 1460 4 Destination Addresss Source Address Etype (8137) IPX SPX Application Data CRC Network Layer Transport Layer Bytes Data Link Layer Figure 1-4 Layer 2 encapsulation examples.
Using the port-mirroring feature of the Ethernet switch, I mirrored the switch port the DHCP server was connected to. This operation allowed me to see all traffic going into and out of the server. If the DHCP server wasn’t receiving the user’s DHCP Discover packets, I would know instantly. When I had the user reboot and attempt to log in again, I saw the DHCP Discover packet from the user coming over the wire. Because I was seeing the same traffic that the DHCP server was, I knew that the DHCP did indeed see the DHCP Discover packet, but again, I never saw it send out a DHCP Offer packet in response.
At the time of its creation, only shared hubs existed; there was no switching. When an Ethernet card is connected directly to a switch port, there are only two stations on the segment, the Ethernet card on the computer and the switch port. By turning off collision detection and allowing both the NIC and the switch to transmit at will, the connection becomes full-duplex. Full-duplex is really just the disabling of collision detection on both ends of a point-to-point Ethernet segment. Nodes on a network need to be able to transmit data frames to a single station, multiple select stations, or all stations.
Algorithms + Data Structures = Programs (Prentice-Hall Series in Automatic Computation) by Niklaus Wirth