Cisco CCNA Notes

layer 2 - DataLink

* DataLink Layer control communication on the immediate link between two devices. * Thunder Bolt Means serial Connection (Wide Area Link). * What is the Data in Layer 1 look Like: – Electricity – electrical Signals – Changes in Volt [view]

By: zeyad1991 | Related Lesson: Layer 2 - Data Link Layer Overview | Modified: June 14, 2016

data link - layer 2

layer 2 controls the communication on the immediate link between 2 devices . the first device and the next immediately connected devices diagrams = circle means router , thunder bolt mean serial connection. data at layer 1 is electrical signals laye [view]

By: hackyshank | Related Lesson: Layer 2 - Data Link Layer Overview | Modified: June 14, 2016

trunking configuration

in switch1: configure terminal interfaces fastethernet 0/1 do show int f 0/1 switchport *can see that this port is by default in dynamic auto mode do show interface trunk *can see there is no trunking switchport mode dynamic desirable * switched port [view]

By: b3Nk0 | Related Lesson: Layer 2 - Trunk Configuration LAB | Modified: June 14, 2016

Cisco study notes

Cisco has three types of memory R.A.M.=Random access memory=is volatile- holds the running configuration- will not survive power outage must save work. NV R.A.M.= NON-VOLATILE – holds the start-up config. (work saved). Flash memory- hold opera [view]

By: coford | Related Lesson: Layer 2 - Cisco IOS LAB (Part 1) | Modified: June 14, 2016

2

Things at Physical Layers: 1- Cables 2- Repeaters. 3- Hubs. _______ * If a Device works in layer 3 that means he works on all below Layers Ex: Router is Layer 3 Device (Network) that means it works in Layers 2 & 1 Also. * Cable Type: – Xbas [view]

By: zeyad1991 | Related Lesson: Layer 1 - Physical Layer | Modified: June 14, 2016

physical layer

physical layer is devices you can touch . router works at network layer and at a lower layer. cabling , repeaters , hubs only work at he physical  layer. X base t X= speed  =Mbps base = base band signaling T= twisted pair base band signalling , o [view]

By: hackyshank | Related Lesson: Layer 1 - Physical Layer | Modified: June 14, 2016

osi layers

rules that apply globally dictating how networks should be built  facilitate  interoperability between networks OSI layer -open systems interconnect  1.physical layer  2. data  layer  3.network layer  4.transport layer  5.session layer 6. p [view]

By: hackyshank | Related Lesson: Open Systems Interconnect Model (OSI) Introduction | Modified: June 14, 2016

what hub does in CCNA

Hub takes a signal in one port repeated out of all other ports except the one that originated the signal [view]

By: inotme | Related Lesson: Layer 1 - Physical Layer | Modified: June 14, 2016

osi

osi model physical layer data link layer network layer transport layer session layer presentation layer application layer [view]

By: amitcharaya | Related Lesson: Open Systems Interconnect Model (OSI) Introduction | Modified: June 14, 2016

trunk links(ports)

– can carry more than 1 vlan at a time – allow 2 or more vlans (or switches) talk to each other over 1 port – switch puts an id on frame(identifies the vlan where it comes from) = Frame Tagging Frame tagging iis done using 1 of 2 pr [view]

By: b3Nk0 | Related Lesson: Layer 2 - Links on a Switch | Modified: June 13, 2016

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