02 Flashcards
Modbus can only be used with serial communications T/F?
F
_________ is a high-speed network technology designed for both LANS and WANS. It is connection oriented and uses a dedicated ciruit between switches
ATM
_________ is a high-speed digital networking standard that specifies data rates over fiber-optic connections
SONET
_______ ________ faster downstream data rates then upstream data rates
Asymmetric ADSL
________ ________ equal data rates for upstream and downstream transfers
________ ________ Up to 100mbs upstream and downstream speeds
Symmetric SDSL
Very High Bitrate VDSL
What are the seven layers of OSI model?
Please Do Not Throw Sausage Pizza Away
Application
Presentation
Session
Transport
Network
Data Link
Physical
What are the devices associated with the physical layer of the OSI model?
Hubs, Repeaters, cables
What are the devices associated with the Data Link layer of the OSI model?
Switch
What are the devices associated with the Network layer of the OSI model?
router
What are the devices associated with the transport layer of the OSI model?
none
What are the devices associated with the session layer of the OSI model?
none
What are the devices associated with the presentation layer of the OSI model?
none
What are the devices associated with the application layer of the OSI model?
none
What is the PDU for every layer of the OSI model?
Application
Presentation
Session
Transport
Network
Data Link
Physical
Because fresh pizza smells delicious delicious delicious
Data, Data, Data, segments, packets, frames, bits
The _______ is the interface between the user’s application and the network when the user network-aware application requires network resources to accomplish a task. Applications are made to be network-aware through __________
What is its PDU?
Application Layer
API
Data
The ______ is responsible for presenting the data at the destination with the same meaning and appearance as it had at the source.
What is its PDU?
presentation Layer
Data
The ________ sets up, coordinates, and terminates conversations, exchanges and dialogues between devices across a network
What is it’s PDU?
Session Layer
Data
What are the session types in the session layer and what are they defined as?
Simplex : communications occur one way (radio)
Half-duplex: communications occur intwo directions but not at the same time (Walkey talkie)
full-duplex: communication occurs in two directions simultaneously
The ____________ manages data delivery between systems or hosts. __________ layer protocols are Ethier connectionless (UDP) or connection oriented (TCP)
What is the PDU for this layer?
Transport Layer
segment
The ___________ is responsible for the logical addressing and routing of messages to their final destination
What is the PDU for this layer?
Network
Packet
The ________ provides a reliable method of transmitting data across the communication link
______ Upper sub layer and handles error checking and flow control between the sender and receiver across a network
_________ and is responsible for mapping logical and physical addressing and across the network media
What is the PDU for this layer?
Data Link Layer
LLC
MAC
Frame
The _______ is where communications between devices takes place
What is the PDU for this layer?
Physical Layer
Bit
What 802 project is responsible for Token ring LAN
802.5
What 802 project is responsible for ethernet lan-csma/cd?
802.3
What 802 project is responsible for wireless lan (wlan) and mesh certification (wi-fi certfication)
802,11
_______ are rules that govern a convention or standard that enables data transfer between two computing endpoints
protocol
When a set of protocols work cooperatively, they are called a _________ or _________
protocol stack, protocol suite
What are the layers of the TCP/IP Model?
Application
Transport
Internet
Network Interface
What is the TCP/IP model?
puts into perspective what protocols are used by each layer of the OSI suite
On a TCP/Ip network, each device with a connection to the network is referred to as a ______
host
The _____ also known as a ______ provides the interface between a computer and the network medium, it has a burned in-address reffered too as the ____________ and works on layer ____of the OSI model/TCP/IP suite
network adapter, NIC, MAC, 2
The loss of signal intensity over distance is _________
attenuation
A device known as an _______ was originally made to solve attenuation however it also strengthened any noise along with the transmission
Amplifier
______ are now used to solve attenuation problems, recieving and regenerating the signal. These devices work at the _______ of the OSI Model and ______ layer of the TCP/IP suite
repeaters
Layer 1, Network interface
What is a dumb switch that sends a signal to all ports regardless if its only meant for one?
What layer of the OSI model do they work at?
hub
Layer 1
______ are devices designed to increase the performance of a network. The goal being to to move frames as quickly as possible within their own network.
_____ also provide the ability to connect networks with different media types, which is called ________
What layer of the OSI model/TCP IP suite does this device work at?
Switches segment networks into collision domains but not broadcast domains T/F?
switches
bridging
Layer 2, Network interface
T
A ______ interconnects LANS or WANS and is loacted at the gateway where one network meets another network
A ______ also provides ___________ and _______ whe multiple paths are avaliable between two endpoints
What layer of the OSI model/TCP IP suite does this device work at?
Router
Router, traffic control, filtering functions
Layer 3, Internet layer
The method of electronically/logically switching the transmit and receive wires inside equipment
Uplink Port
What is Unicast addressing?
sending traffic to a single destination/host
What is multi-cast addressing?
sends traffic to a group of hosts or recipients
What is Broadcast addressing?
sending traffic to all hosts on a network
What is Anycast addressing?
maps traffic to the nearest host providing a specific service
A Layer 2 broadcast Usses the destination Ethernet address value of ___________________
F bomb, FF:FF:FF:FF:FF:FF
An address with a value of 1 in the least significant bit of the first block (01, 03, AB) signifies _________
Layer 2 multicast address
The ________ mac address is used to reference the MAC address table and send frames to the destination as quickly as possible
Destination
interconnecting multiple switches on a LAN sometimes creates what is called a __________
What was created to solve this problem and how does it work?
bridge Loop
Spanning Tree protocol (STP) it blocks redundant ports
What 802 project is Ethernet? What duplex modes is it able to operate in? And what topologies is it used on? What OSI layer does it operate at?
802.3, half/full, Bus and Star topologies, Layer 2
What duplex mode risks collisions because the frames they send is on a shared ethernet channel
Half-duplex
_________ limits transmission to one station at a time, providing the ability for devices to listen to the network prior to transmitting
CSMA/CD
What ethernet duplex mode is a mode of operation allowing simultaneous communication between a pair of stations?
Full-Duplex
