Svitsjeprinsipper Innholdet i denne siden og sidene som ligger under alle pekerene, skal du ha kjennskap til. Både lyd og bilde kan digitaliseres. Derfor er elektronisk kommunikasjon basert på overføring av digitale signaler. En kilde sender ut en strøm av informasjon. Mange kilder med info-strøm skal behandles samtidig og overføres til mottaker så raskt som mulig. For å kunne skape en effektiv info-strøm, må info fra hver kilde deles i enheter. Figuren nedenfor viser i prinsippet hvordan enheter fra forskjellige kilder overføres på samme linje. Multipleksing er ikke en enkel metode eller prinsipp, men en samlebetegnelse på metoder og prinsipper som gjør det mulig å overføre mange signaler (telefonsamtaler, datafiler, bilder, video, ...) samtidig på en felles overføringskanal. Det skilles mellom to fundamentalt forskjellige priunsipper for multipleksing: frekvensdelt multipleksing (FDM) og tidsdelt multipleksing (TDM). Det er mulig å kombinere tids- og frekvensdelt multipleksing .
Fing for iOS Test App fragroute Abstract fragroute intercepts, modifies, and rewrites egress traffic destined for a specified host, implementing most of the attacks described in the Secure Networks "Insertion, Evasion, and Denial of Service: Eluding Network Intrusion Detection" paper of January 1998. It features a simple ruleset language to delay, duplicate, drop, fragment, overlap, print, reorder, segment, source-route, or otherwise monkey with all outbound packets destined for a target host, with minimal support for randomized or probabilistic behaviour. This tool was written in good faith to aid in the testing of network intrusion detection systems, firewalls, and basic TCP/IP stack behaviour. Please do not abuse this software. Download Current source: fragroute-1.2.tar.gz Required libraries: Supported platforms: BSD (OpenBSD, FreeBSD, NetBSD, BSD/OS, MacOS X) OpenBSD < 3.1 loopback patch - allow setting of loopback MTU Linux (Redhat, Debian, Slackware, ...) Documentation Ideas Dug Song <dugsong@monkey.org>
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Traceroute, Ping, Domain Name Server (DNS) Lookup, WHOIS Network Cabling Standards Guide, By Siemon Home > Standards Dear customers, partners and friends, At Siemon, we believe industry standards help you achieve the most out of your networks. For this reason, we have put together a guide to network cabling and data center standards. We are pleased to introduce: Standards Informant. Standards Informant is a new website covering a wide range of standards topics including twisted-pair cabling, fiber optic cabling, data center standards, pathways and spaces, bonding and grounding, industrial premises standards, building automation systems, energy efficiency and a whole lot more. We hope you enjoy the new Standards Informant website. Thanks, - All of Us at Siemon Standards Update Learn what's going on in with standards development with this Industry Standards Activity Overview of activites in TIA, IEEE, ISO/IEC JTC 1/SC 25/WG 3 (Customer Premises Cabling), IEC SC 48B (Connectors), and BISCI. »Download PDF Shielded Copper Cabling Resource Center »Shielded Cabling Resource Center »Full Article »More
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