Block 2 unit 1 Flashcards
1.A________ converts digital data to analog signals for transmission over an analog medium.
MODEM
- Network media converters connect various types of __________ that exist within a network.
Cables
- Switches forward frames based on the________ address.
MAC
- The switching technique that checks the ____ _____ _____ of a frame for fragmentation before forwarding the frame is called fragment free.
First 64 bytes
- The switching technique that stores the frame and performs an error check is the ______ ________ _______technique.
Store and Forward
- When a data packet comes in on one of the lines, the router reads the ___ _______ information in the packet to determine its ultimate destination.
IP address
- Which devices are able to perform a dynamic load balance of communications traffic when alternative routes are available between networks?
Routers
- A ___________ acts as a translator between two computers or networks that use different operating systems, communications protocols, data format structures, or network hardware architecture.
Gateway
- A ________ __________ is an internetworking system capable of joining together two networks that use different base protocols.
Network gateway
- Which gateway type passes traffic from one network to another network?
Default Gateway
- Which gateway type incorporates advance security features that allow for defense against phishing attacks and malware?
E-mail Gateway
- In digital transmissions, ______________________ is a method of sending more bits per second, than narrowband.
Wideband Communication
- _________________ is defined as the simultaneous encryption of all channels of a multichannel telecommunications link.
BULK Encryption
- Network encryption applies ______ _____ at the network transfer layer and the data is only encrypted while __ ___________.
Crypto Services
In transit
- Twisted-pair and fiber optic cabling are examples of ___________.
Guided/bound media
What is twisted pair cable UTP?
Unshielded Twisted Pair
What is twisted pair cable STP?
Shielded twisted pair
- each twisted pair shielded/insulated to reduce noise both from inside and outside the cable
_______________ is the most popular type of network cable.
Ethernet/UTP
Category____ UTP is not suitable for data transmission, but is Voice-grade telephone wire
UTP Category 1
What Category ____UTP is rated for data transmission speeds up to 1 Gbps(Fast Ethernet Standard) minimizes crosstalk
Category 5(e) UTP
What Category ____UTP is rated for data transmission speeds up to 10Gbps.(Gigabit Ethernet Standard)
Category 7A UTP
Fiber optic cables are immune to all types of EMF monitoring. (True/False)
True
Which guided media uses a laser as the light source?
Single-mode Fiber
What are two types of unguided media?
Radio Waves, and Light transmissions
One problem with light transmissions is _____ conditions, such as fog, can degrade the signal.
Atmospheric
Freedom of movement or ___ is an advantage of unguided/unbound media.
Mobility
What are three disadvantages of unguided/unbound media are?
Security, speed, and distortion/Interference
What is the International Organization for Standardization (ISO) most famous standard?
OSI Reference Model
Open System Interconnection
What is the Layered Architecture?
7 Layers
- Each covers different network activities, equipment, or protocols
- Services as data moves from the source to the destination through the network
What are the 7 layers of the OSI reference model?
Application, Presentation, Session, Transport, Network, Data link, Physical
Which _____ layer of the OSI reference model relates to the services that directly support user applications?
Application
Which layer of the OSI reference model provides flow control and error handling, and participates in solving problems concerned with the transmission and reception of packets?
Layer 4 Transport
Which layer of the OSI reference model ensures that the information sent is reformatted bacon into the same format as the original and renders the underlying code into words, pictures, video, or audio supported by the application?
Layer 6 Presentation
______ is a highly structured dialog between two workstations?
Session
Which of the layers of the OSI reference model performs name-recognition and other functions, such as security and synchronization that are needed to allow applications to communicate over the network?
Layer 5 Session
The Network layer of the OSI reference model is responsible for ______ messages and translating lógica al addresses and names into physical addresses.
Addressing
Which layer provides the functional and procedural means to transfer data between network entities and may provide the means to correct errors?
Layer 2 Data Link
The physical layer receives data frames from the data layer and transmits it as a __ ___ __ over a physical medium
Raw Bit Stream
What are the five layers of TCP/IP?
Application, Transport, Network, Data Link, and Physical
A multiplexer combines several ______ or __________ signals for transmission over one single medium and provides _______ correction and data ________.
Data
Voice
error
Security
Multiplexer use an error detection/correction scheme to ensure the ______ of the transmitted data
Integrity
What would a person need to know in order to “tap” into a multiplexed signal?
Link protocol, data format, and channel assignment
Wave division multiplexing combines several different data signals into a single ___ _____ cable.
Fiber Optic
Light signals are multiplexed by what?
Optical Combiner
What type of splitter does the de-multiplexer use to split light into many channels?
Light Splitter
Time division multiplexing(TDM) involves the distribution of ________ signals in the time domain
Multiple
Time division multiplexing(TDM) involves the distribution of multiple signals in a time domain? True or False
True
Each user in a Time division multiplexing(TDM) is assigned a specific _______________?
Time Slot
If a user has no data to send using TDM, the user time slot _______________?
Stays Empty
