Cisco CCNA Notes


open systems interconnect model (OSI) 1- PHYSICAL LAYER 2- DATALINK LAYER 3- NETWORK LAYER 4- TRANSPORT LAYER 5- SESSION LAYER 6- PRESENTATION LAYER 7- APPLICATION LAYER making the world communicate with each other.   [view]

By: rosanealves | Related Lesson: Open Systems Interconnect Model (OSI) Introduction | Modified: June 15, 2016


mac adress =48 bit[eg:002A.ABCD.1234] first 24bit is OUI(organisation unique identifier) [view]

By: goodz | Related Lesson: Layer 2 - Data Link Layer Overview | Modified: June 15, 2016

cabling, Repeaters, Hubs

Covering cable types: X base T  ->  Ethernet Signaling ; X- Speed of the cable; Base- Baseband signalling; T- twisted pair.  If X is 10, it can transfer 10Mbps. Base- Baseband mean one one signal on the line at a time. Broadband- More then one [view]

By: nanditha | Related Lesson: Layer 1 - Physical Layer | Modified: June 15, 2016

IOS modes

conf t *global configration mode – any change made from this mode, will affect the device as a whole exit or end or ctrl+ z *exit from conf mode. end and ctrl+z will take us to the priv mode no matter where we are. in conf t: hostname *give nam [view]

By: b3Nk0 | Related Lesson: Layer 2 - Cisco IOS LAB (Part 2) OS Modes | Modified: June 15, 2016

study notes

VALN is a layer 2 broadcast domain each port on a switch is its own broadcast domain two type of links or ports that can exist on a switch (access and trunking links Access links- is any port on a switch that carries or is apart of one VLAN. by d [view]

By: coford | Related Lesson: Layer 2 - VLAN Domains | Modified: June 15, 2016

Broadcast and collison

a broadcast domain is the area of a network where a broascast will spread out if send by one device. aread of netowrk if two or more  devices transmits at same time and they are running half duplex ethernet and both devices transmits at same time th [view]

By: sushmi.J | Related Lesson: Layer 2 - Broadcast Domains | Modified: June 16, 2016

Physical Layer

X base T Cables – Base Band Signalling For Two Similar Devise needs to use cross over cable and for different we use staright cable   [view]

By: sandeep-vidyarthi | Related Lesson: Layer 1 - Physical Layer | Modified: June 15, 2016

about MAC functions.

where is mac used:In PDU (protocol data unit) which is called as frame in Layer 2. FRAME: dest add,source add, data, frame check sequence CRC(algorithm) devices at layer 2 1 .switch Switch function: indide sswitch there is MAC add. cable (ie) listing [view]

By: sushmi.J | Related Lesson: Layer 2 - Mac Addresses | Modified: June 15, 2016

data link MAC add.

Layer 2- controls communication on immediate link bt two devices data has been put into set structure .its called PDU(protocol data unit) In layer 2 data is called PDU is frame Layer 2 needs MAC add ..its looks like 48 bit in length (hexadecimal) eg: [view]

By: sushmi.J | Related Lesson: Layer 2 - Data Link Layer Overview | Modified: June 15, 2016

physical layer

stuff that u can touch .eg,cables,hubs,repeaters cables-x(speed) based(base band signalling) t(twisted pair) cableing -known as ethernet; if x is 10 cables can transmit 10 megabiys a second base band signalling -one one signal in one wire . t-each wi [view]

By: sushmi.J | Related Lesson: Layer 1 - Physical Layer | Modified: June 15, 2016

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