NAVEDTRA 14224, Ch. 1 Flashcards
Which type of network are the workstations in close proximity to each other, usually within the same building?
Local Area Network (LAN)
Which type of network are the workstations basewide as in one command connected to another
command or one base connected to another base?
Metropolitan Area Network (MAN)
How many primary modes of system operation are there?
2
How many common situations for rebooting the system are there?
4
Which term refers to the process of recording events and using that information to detect usage violations or to confirm that network procedures are operating correctly?
Auditing
What is defined as a mechanism by which one computing element can get the attention of another element?
Interrupt
How many Interrupt Request Lines (IRQs) for hardware interrupts are there in a PC environment?
16
What is defined as a connection on the back of a computer where you connect peripherals, switches, networks, or other devices?
Port
Which type of hardware connection is used to send data one bit at a time and is very good for sending information over a long distance?
Serial
Which names are reserved by DOS to reserve the first serial and parallel ports, respectively?
COM1 and LPT1
During the pinging process what is the ping that is sent out called?
Echo message
What prevents files from being updated by more than one user at a time?
Data Integrity
Which term refers to duplicate hardware and network facility segments that are available at all times?
Redundancy
What is the physical arrangement of a LAN’s components called?
Topology
What are the three major types of LAN configurations or topologies?
Star, bus, and ring
Which type of network is each component connected directly to the central computer or network server?
Star
Which type of network are all components or nodes connected to the same cable, and the far ends of this cable never meet?
Bus
Of all the topologies which is the least reliable because it has a single point of failure?
Star
What is the wiring concentrator which allows workstations to be either inserted or bypassed on the ring?
Multistation Access Unit (MAU)
What define how networks establish communications between elements, exchange information, and terminate communications?
Potocols
How many major functions do protocols have?
2
Which control procedure sends multiple blocks of data and returns a single acknowledgement for many blocks, thereby increasing the amount of time spent transmitting data?
SDLC
What are the two principal network access methods?
Contention and Token passing
How many layers does the OSI model consist of?
7
What provides a basis for coordinating the development of standards that relate to the flexible interconnection of incompatible systems using data communications facilities?
Open systems Interconnection (OSI) model
Which layer of the OSI model is the physical layer?
1
Which layer of the OSI model is the data link layer?
2
Which layer of the OSI model is the network layer?
3
Which layer of the OSI model is the transport layer?
4
Which layer of the OSI model is the session layer?
5
Which layer of the OSI model is the presentation layer?
6
Which layer of the OSI model is the application layer?
7
Which layer of the OSI model addresses the electrical, mechanical, and functional interface to the carrier?
Physical
Which layer of the OSI model provides error-free transmission of information over the physical medium?
Data link
Which layer of the OSI model decides which physical pathway the data should take?
Network
Which layer of the OSI model ensures data units are delivered error-free, in sequence, with no losses or duplications?
Transport
Which layer of the OSI model performs the functions that enable two applications to communicate across the network, performing security, name recognition, logging, administration, and other similar functions?
Session
Which layer of the OSI model provides a common representation of data that can be used between the application processes?
Presentation
Which layer of the OSI model provides data encryption for privacy and authentication?
Presentation
Which layer of the OSI model represents the services that directly support users and application tasks?
Application
What is by far the cheapest type of transmission media?
Twisted-wire pairs
What are the two most common types of twisted-pair media?
22 and 24 gauge
What is the transmission rate of a T1 line?
1.5 Mbps
What is the transmission rate of a T2 line?
6.3 Mbps
What is the transmission rate of a T3 line?
46 Mbps
What is the transmission rate of a T4 line?
281 Mbps
Coaxial cable is used extensively in local-area networks whenever the distance involved is relatively short, generally less than 2 miles for baseband LANs and how many miles for broadband LANs?
10
What is defined as a software package that makes it possible to implement and control a network and enables users to use the resources and services on that network?
Network Operating System (NOS0
What are used to secure a Local Area Network from a public network?
Firewalls
