System Wiring Devices

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System Wiring and Gadgets . Geert Jan de Groot. System Wiring. Half/full duplex Ethernet System Wiring Autonegotiation Organized wiring Optics Your inquiries please!. Copper Ethernet media. Persuade (10 Mbit/sec) now outdated Turned pair Uses pair 1-2, 3-6, 4-5, 7-8

Presentation Transcript

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´╗┐Organize Wiring & Devices Geert Jan de Groot

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Network Wiring Half/full duplex Ethernet Network Wiring Autonegotiation Structured wiring Optics Your inquiries please!

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Copper Ethernet media Coax (10 Mbit/sec) now outdated Twisted combine Uses match 1-2, 3-6, 4-5, 7-8 10 Mbit/sec (10BASE-T) 100 Mbit/sec 1000 Mbit/sec ('gigabit ethernet') (10.000 Mbit/sec)

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A couple words on 10BASE-T Available wherever today Uses combine 1-2, 3-6 Unshielded wound combines Often miswired Typically half-duplex Full duplex conceivable Max length 100 meters!

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10BASE-T links Crossover link Used center point to center point or host to host Normal link Used from host to center point Some centers have worked in hybrids

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100 Mbit copper systems 3 guidelines: 100BASE-TX <<- - Winner 100BASE-T4 <<- - Loser 100VG-Anylan <<- - Loser Don't purchase anything other than 100BASE-TX!

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100BASE-TX Requires Category 5 ('CAT5') cabling No more, no less 100BASE-TX keeps running on 2 wire sets 1-2, 3-6, as 10BASE-T Cheap today Built in PC chipset Replacing 10BASE-T rapidly

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Faster: Gigabit Ethernet 1000 Mbit/sec, 1000BASE-T Still takes a shot at CAT5 cabling, tight fit Uses every one of the 4 wire matches In both bearings About to get shabby and normal $35 SRP for a gigabit organize card Being incorporated in PC chipset (supplanting 100BASE-TX) Automatic hybrid extra new component

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Still speedier: 10 Gigabit Ethernet 10 Gigabit initially just on fiber 10 Gigabit on copper as of now being a work in progress by IEEE 802.3 benchmarks council Close to Shannon Limit Standard will be IEEE 802.3an

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Half/Full duplex Ethernet is CSMA/CD Carrier Sense Multiple Access/Collision Detection Without Full Duplex, just a single station transmitting whenever With Full Duplex, parcels can be sent in both headings simultaniously

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Half duplex Listen before you transmit Listen while you transmit If there is an impact, both transmitters will: Jam Backoff (exponentially, arbitrarily) Re-take a stab at sending the bundle Minimal parcel measure: 64 bytes Collisions are safe! Really help scale/balance out an ethernet organize

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Full duplex Allows transmission/gathering all the while Impossible on more established persuade media Easy to actualize on contorted combine/fiber media No crashes More data transmission accessible

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Link beats 10BASE-T sends interface beats when sit used to test trustworthiness of connection (why?) connect light 100BASE-T utilizes speedier connection beats Automatic identification in the vicinity of 10 and 100 conceivable Manual setting of half/full duplex Settings must match

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Autonegotiation Method to naturally choose "best" transmission strategy between connection accomplices Link beat now gets to be heartbeat prepare Automatically sets speed, duplex and so forth

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Autonegotiation (2) 'Parallel recognition' for gadgets w/o autonegotiation 10BASE-T and 100BASE-TX just Only HDX Autonegotiation required for gigabit ethernet Technology is develop now Early chips had significant issues, so know

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Autonegotiation disappointment mode 100Mbit FDX Autonegotiation One end set to settled 100Mbit, Full-Duplex flip side uses autonegotiation What happens?

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Structured wiring "Everything over a similar wiring"

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Wire Types Category 3: 10 Mbps Category 4: 16 Mbps (for token ring) Category 5: 100 Mbps/1000 Mbps Shielded or unshielded Advice: utilize Cat 5 UTP (unshielded turned match) Category 6, 7 and higher advertising buildup Not official IEEE spec

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Structured wiring pitfalls High establishment cost so introduce enough the first run through Use materials that are fit the bill for Cat 5 Get ensure from installer (IP Telephony?)

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Fiber optics Must utilize fiber between structures Cable length confinements Lightning assurance Multi mode: short pulls Single mode: whole deals

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Fiber optics (2) Different fiber distances across Different connector sorts ST for the most part "more established" 10mbit stuff SC fresher, by and large 100mbit VF45

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Fiber optics (3) 10BaseF for 10Mbps ethernet 100BaseFX for 100Mbps quick ethernet 1000BaseSX for gigabit ethernet Advice: run a greater number of filaments than you require, yet don't end them (yet)

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Power Over Ethernet Allows to power gadget over ethernet link No power fitting or divider wart Uses "unused" wire sets Convenient for spots where power is troublesome Wireless get to focuses IP phones IEEE 802.3af standard as of late acknowledged Be mindful of pre-standard (incongruent) hardware

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Hubs, Switches and Routers How would they function? What are the distinctions?

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Packet headers Ether IP TCP Data Edst Esrc T IPsrc IPdst Network gadgets may utilize {ether, IP} headers to carry out it's employment (in some cases in turned ways)

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Types of ethernet addresses Typically one hinder per bundle got Interrupts cost a great deal of CPU execution! Utilize ethernet locations to have the capacity to channel bundles in ethernet recipient equipment First 3 bytes (really, just 22 bits) relegated by IEEE Organizational Unique Identifier 3 sorts of locations: Unicast, Multicast, Broadcast

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Ethernet address sorts Last 2 bits of first byte gives sort: 00: 01:02:03:04:05 0000 00 : unicast (single host) 01: 01:02:03:04:05 0000 00 01 : multicast (gathering of hosts) ff:ff:ff:ff:ff:ff : communicate (all hosts) Special instance of multicast

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Ethernet center point Hub

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Ethernet center (2) Hub is layer 1 gadget Hub does not channel parcels Whole center point is one impact space Hence can't do full duplex Daisychaining of centers restricted Cheap Doesn't exist for Gigabit Ethernet

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Ethernet Switch

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Ethernet Switch (2) Formally, a switch is only a scaffold Switch takes a gander at ethernet headers (layer 2) ethernet to ethernet just Learns what locations are associated with which ports If goal of parcel known, the bundle is just sent to the goal port

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Ethernet Switch (3) Each port is a different crash area no daisychain farthest point Can do full duplex Often one host for each port elite Security highlights Dualspeed "center point" incorporates switch

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Router

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Router (2) Router takes a shot at IP header (layer 3) Can utilize any basic media LAN or WAN Can have a few ports Useful for long separation associations (spine) Must be arranged IP addresses and so on

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