Networking Basics Cisco
Set of Rules governing the communication between network devices - ANS-protocol
a layer two switch operates at this layer of the TCP/IP model - ANS-data link
antiquated layer 1 device which Cisco no longer sells - ANS-hub
correct way to measure speed of the info transferred over a network - ANS-bits per sec.
data at rest - ANS-bites
active data - ANS-bit
PDU - ANS-Data unit = (data + protocols)
correct association of layer, device and PDU - ANS-layer 3, router, packets
frames are in what layer? - ANS-layer 2
encapsulation - ANS-occurs as data is transmitted (down the stack) -- need to put all these
protocols on.
De-encapsulation - ANS-occurs as data is received (up the stack)-- rip of all the "packaging" to
see the content
parameters - ANS-encapsulated by sender are used by the received
Proprietary - ANS-intellectual property of a company
protocol - ANS-governs the communication--> typically on the lower stack (layers 1-4,
applications are in the higher layers)
standard - ANS-formally approved model. Interoperable, allows disparate systems to
communicate
CDP - ANS-propriety protocol --> Cisco Discovery Protocol. Has additional features than the
standard LLDP
LLDP - ANS-Standard Cisco Protocol
, Pros of Proprietary Protocol - ANS-more efficiency, additional features, flexibility, competitive
advantage and helps with "stickiness" --> because you own it can be better
Cons of Proprietary Protocol - ANS-Less interoperability, does it play well with others?,
ecosystem
data storage - ANS-TB (terabytes), PetaBytes
Transmission speed - ANS-kbps (kilo bits per sec), Gbps (giga bits per sec), Mbps (mega bits
per sec)
b= - ANS-bits, movement, 8 bits in a byte, binary digit (1 or 0)
B= - ANS-byte, rest, 1 byte= 8 bits
k - ANS-kilo, 1000 bits/sec
M= - ANS-mega bits, 1 million bits
G= - ANS-Giga 1 billlion bits
OSI= - ANS-Open Systems Interconnect is the standard reference model used in networking
and communications (it's modular)
- 7 layers
- basis for protocols used when devices need to communicate over a network
- every layer of the model has protocols
- the upper layers of the model are dependent upon the lower layers
7 layers of the OSI model - ANS-physical, data link, network, transport, session, presentation,
application (please do not throw sausage pizza away)
most common protocol at layer 3 - ANS-IP/ethernet
most common protocol at layer 1 - ANS-wires/wireless
any application you use that requires internet activity is going to have all the layers of the OSI
model - ANS-
Benefits of the layers - ANS-- Standardizes interfaces
- Ensures interoperable technology,
- Facilitates modular engineering,
- Accelerates Evolution,
- Simplifies teaching and learning,
- Reduces complexity and cost
Set of Rules governing the communication between network devices - ANS-protocol
a layer two switch operates at this layer of the TCP/IP model - ANS-data link
antiquated layer 1 device which Cisco no longer sells - ANS-hub
correct way to measure speed of the info transferred over a network - ANS-bits per sec.
data at rest - ANS-bites
active data - ANS-bit
PDU - ANS-Data unit = (data + protocols)
correct association of layer, device and PDU - ANS-layer 3, router, packets
frames are in what layer? - ANS-layer 2
encapsulation - ANS-occurs as data is transmitted (down the stack) -- need to put all these
protocols on.
De-encapsulation - ANS-occurs as data is received (up the stack)-- rip of all the "packaging" to
see the content
parameters - ANS-encapsulated by sender are used by the received
Proprietary - ANS-intellectual property of a company
protocol - ANS-governs the communication--> typically on the lower stack (layers 1-4,
applications are in the higher layers)
standard - ANS-formally approved model. Interoperable, allows disparate systems to
communicate
CDP - ANS-propriety protocol --> Cisco Discovery Protocol. Has additional features than the
standard LLDP
LLDP - ANS-Standard Cisco Protocol
, Pros of Proprietary Protocol - ANS-more efficiency, additional features, flexibility, competitive
advantage and helps with "stickiness" --> because you own it can be better
Cons of Proprietary Protocol - ANS-Less interoperability, does it play well with others?,
ecosystem
data storage - ANS-TB (terabytes), PetaBytes
Transmission speed - ANS-kbps (kilo bits per sec), Gbps (giga bits per sec), Mbps (mega bits
per sec)
b= - ANS-bits, movement, 8 bits in a byte, binary digit (1 or 0)
B= - ANS-byte, rest, 1 byte= 8 bits
k - ANS-kilo, 1000 bits/sec
M= - ANS-mega bits, 1 million bits
G= - ANS-Giga 1 billlion bits
OSI= - ANS-Open Systems Interconnect is the standard reference model used in networking
and communications (it's modular)
- 7 layers
- basis for protocols used when devices need to communicate over a network
- every layer of the model has protocols
- the upper layers of the model are dependent upon the lower layers
7 layers of the OSI model - ANS-physical, data link, network, transport, session, presentation,
application (please do not throw sausage pizza away)
most common protocol at layer 3 - ANS-IP/ethernet
most common protocol at layer 1 - ANS-wires/wireless
any application you use that requires internet activity is going to have all the layers of the OSI
model - ANS-
Benefits of the layers - ANS-- Standardizes interfaces
- Ensures interoperable technology,
- Facilitates modular engineering,
- Accelerates Evolution,
- Simplifies teaching and learning,
- Reduces complexity and cost
