We have all encountered terms like virus, warms, spyware etc many many times in the internet “jungle” without actually distinguishing between them. In this post I will try to define and compare all these malware threats that flow around the computer and internet worlds. Virus: A virus is a malware program that is loaded on […]
[Continue reading]Cisco Certifications – How to recertify
Because my CCNP certification was going to expire recently, I made some research to find out how to recertify. It was a pleasure to discover that by passing any 642-xxx exam, this recertifies you ALL Professional Level certifications (CCNP, CCDP, CCIP, CCSP, CCVP). Of course, the 642-xxx exam has to be a part of the […]
[Continue reading]Most Common Networking Terms and Acronyms – X
X terminal Terminal that allows a user simultaneous access to several different applications and resources in a multivendor environment through implementation of X Windows. See also X Window System X Window System Distributed, network-transparent, device-independent, multitasking windowing and graphics system originally developed by MIT for communication between X terminals and UNIX workstations. See also X […]
[Continue reading]Most Common Networking Terms and Acronyms – W
WAN wide-area network. Data communications network that serves users across a broad geographic area and often uses transmission devices provided by common carriers. Frame Relay, SMDS, and X.25 are examples ofWANs. Compare with LAN and MAN. WDM wavelength division multiplexing. Multiple optical wavelengths can share the same transmission fiber. The spectrum occupied by each channel […]
[Continue reading]Most Common Networking Terms and Acronyms – V
V.24 ITU-T standard for a physical layer interface between DTE and DCE. V.24 is essentially the same as the EIA/TIA-232 standard. See also EIA/TIA-232. V.25bis ITU-T specification describing procedures for call setup and tear down over the DTE-DCE interface in a PSDN. V.32 ITU-T standard serial line protocol for bidirectional data transmissions at speeds of […]
[Continue reading]Most Common Networking Terms and Acronyms – U
U interface The interface between the telco and the user, also known as the local digital subscriber line (DSL) loop. UDP User Datagram Protocol. Connectionless transport layer protocol in the TCP/IP protocol stack. UDP is a simple protocol that exchanges datagrams without acknowledgments or guaranteed delivery, requiring that error processing and retransmission be handled by […]
[Continue reading]Most Common Networking Terms and Acronyms – T
T.120 ITU standard that describes data conferencing. H.323 provides for the capability to establish T.120 data sessions inside an existing H.323 session. T.30 Describes the overall procedure for establishing and managing communication between two fax machines. T.38 Defines procedures for real-time Group 3 facsimile communication over IP networks. T1 Digital WAN carrier facility. T1 transmits […]
[Continue reading]Most Common Networking Terms and Acronyms – S
SAN storage area networking. An emerging data communications platform that interconnects servers and storage at Gigabaud speeds. By combining LAN networking models with the core building blocks of server performance and mass storage capacity, SAN eliminates the bandwidth bottlenecks and scalability limitations imposed by previous SCSI bus-based architectures. SAP 1. service access point. Field defined […]
[Continue reading]Most Common Networking Terms and Acronyms – R
RA registration authority. Optional PKI entity (separate from the CAs) that does not sign either digital certificates or CRLs but has responsibility for recording or verifying some or all of the information (particularly the identities of subjects) needed by a CA to issue certificates and CRLs and to perform other certificate management functions. RADIUS Remote […]
[Continue reading]Most Common Networking Terms and Acronyms – Q
Q.2931 ITU-T specification, based on Q.931, for establishing, maintaining, and clearing network connections at the B-ISDN user-network interface. The UNI 3.1 specification is based on Q.2931. See also Q.931 and UNI. Q.920/Q.921 ITU-T specifications for the ISDN UNI data link layer. See also UNI Q.922A ITU-T specification for Frame Relay encapsulation.
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