Shared Flashcard Set

Details

telecommunications
telecommunications, cit 370
146
Computer Networking
01/17/2011

Additional Computer Networking Flashcards

 


 

Cards

Term
server
Definition
A ____ facilitates communication and resource sharing between other computers on the network.
Term
peer-to-peer
Definition
Which network model ensures that no computer on the network has more authority than another?
Term
star
Definition
Which network topology is the most common?
Term
Data packets
Definition
____ are the distinct units of data that are exchanged between nodes on a network.
Term
MAN
Definition
A ____ network connects clients and servers from multiple buildings.
Term
Access
Definition
____ services allow remote users to connect to the network.
Term
Mail servers
Definition
____ provide a Web-based client for checking e-mail.
Term
communications
Definition
Which type of service supports e-mail?
Term
servers
Definition
Often, separate LANs are interconnected and rely on several ____ running many different applications and managing resources other than data.
Term
MAC
Definition
Which Data Link sublayer manages access to the physical medium?
Term
LLC
Definition
Which Data Link sublayer manages flow control?
Term
Reassembly
Definition
____ is the process of reconstructing segmented data.
Term
Network
Definition
In which OSI model layer does IP operate?
Term
Physical
Definition
In which OSI model layer do hubs operate?
Term
802.11
Definition
Which IEEE standard describes specifications for wireless transmissions?
Term
minimum acceptable
Definition
Standards define the ____ performance of a product or service.
Term
segments
Definition
Transport layer protocols break large data units into ____.
Term
physical address
Definition
The ____ is a fixed number associated with a device’s NIC.
Term
802.3
Definition
Which IEEE standard describes Ethernet?
Term
cable plant
Definition
Which term describes the hardware that makes up the enterprise-wide cabling system?
Term
Horizontal wiring
Definition
____ describes wiring that connects workstations to the closest telecommunications closet.
Term
EIA/TIA RS-232 (Recommended Standard 232)
Definition
____ describes a popular serial data transmission method.
Term
throughput
Definition
The data transmission characteristic most frequently discussed and analyzed by networking professionals is ____.
Term
telecommunications closet
Definition
Which term identifies a room containing connectivity for groups of workstations in its area?
Term
throughput
Definition
The most significant factor in choosing a transmission method is its ____.
Term
installation
Definition
Many network problems can be traced to poor cable ____ techniques.
Term
cross talk
Definition
The more twists per foot in a pair of wires, the more resistant the pair will be to ____.
Term
carrier
Definition
In modulation, a simple wave called a ____ wave, is combined with another analog signal to produce a unique signal that gets transmitted from one node to another.
Term
DB-25
Definition
Which connector is used in RS-232 transmissions?
Term
all devices on your network segment
Definition
Suppose you send data to the 11111111 11111111 11111111 11111111 IP address. To what device(s) are you transmitting?
Term
video transmission over the Web
Definition
Which of the following applications would be best suited to using UDP?
Term
a broadcast to all the nodes on its segment
Definition
What method of transmission does a workstation use to send an ARP request?
Term
the lease duration for client computers
Definition
You are the network manager for a computer training center that allows clients to bring their own laptops to class for learning and note-taking. Clients need access to the Internet, so you have configured your network’s DHCP server to issue them IP addresses automatically. What DHCP option should you modify to make sure you are not wasting addresses that were used by clients who’ve completed a class and no longer need them?
Term
Students and professors will be unable to Telnet to the server or FTP files to or from the server.
Definition
You manage a server that allows university students to use Telnet to make a connection, then use FTP to upload their homework. Professors also pick up students’ homework by telnetting to the computer and using FTP. You have decided to change the FTP port number on the server from its default number to 23, for better security. Assuming students and professors make no changes to their default workstation configurations, what will be the result of this change?
Term
All devices that are reachable
Definition
Suppose you send data to an address that begins with the Format Prefix FF0E on a net-
work running IPv6. To what device(s) are you transmitting?
Term
It is discarded by the connectivity device.
Definition
What happens to an IP datagram when its TTL reaches 1?
Term
root servers
Definition
What devices are the highest authorities in the domain name system hierarchy?
Term
to obtain the MAC address of a host, and then map that MAC address to the host’s IP address
Definition
What is the function of ARP?
Term
BOOTP relies on a static table to associate IP addresses with MAC addresses, whereas DHCP does not.
Definition
What is the main difference between BOOTP and DHCP?
Term
shim
Definition
Collectively, MPLS labels are sometimes called a ____.
Term
daisy-chain
Definition
A ____ is simply a linked series of devices.
Term
1000Base-LX
Definition
The most common 1-Gigabit Ethernet standard in use today is ____.
Term
preamble
Definition
Within Ethernet frame types, the ____ signals to the receiving node that data is incoming and indicates when the data flow is about to begin.
Term
reassembles
Definition
In packet switching, when packets reach their destination node, the node ____ them based on their control information.
Term
10GBase-SR
Definition
The 10-gigabit fiber optic standard with the shortest segment length is ____.
Term
long reach
Definition
In the 10GBase-LR standard, the L stands for ____.
Term
1 Gbps
Definition
1000Base-SX has a maximum throughput of ____.
Term
hybrid
Definition
A complex combination of pure topologies is known as a ____ topology.
Term
twisted pair
Definition
The 10GBase-T standard is considered a breakthrough for transmitting 10 Gbps over ____ medium.
Term
speed
Definition
The primary difference between the two USB standards is ____.
Term
speed
Definition
The primary difference between the two USB standards is ____.
Term
speed
Definition
The primary difference between the two USB standards is ____.
Term
VLANs
Definition
Switches can create ____ by grouping a number of ports into a broadcast domain.
Term
Gateways
Definition
____ are combinations of networking hardware and software that connect two dissimilar kinds of networks.
Term
Static
Definition
____ routing is a technique in which a network administrator programs a router to use specific paths between nodes.
Term
router
Definition
A ____ is a multiport connectivity device that directs data between nodes on a network.
Term
lanes
Definition
PCIe slots vary depending on the number of ____ they support.
Term
content
Definition
Switches that operate anywhere between Layer 4 and Layer 7 are also known as ____ switches.
Term
data transceiver
Definition
Nearly all NICs contain a(n) ____, the device that transmits and receives data signals.
Term
base I/O port
Definition
The ____ setting specifies, in hexadecimal notation, which area of memory will act as a channel for moving data between the NIC and the CPU.
Term
CMOS
Definition
____ is a type of microchip that requires very little energy to operate.
Term
its double-ring topology
Definition
What part of a SONET network allows it to be “self-healing”?
Term
any type of Internet connection
Definition
A VPN is designed to connect 15 film animators and programmers from around the state of California. At the core of the VPN is a router connected to a high-performance server used for storing the animation files. The server and router are housed in an ISP’s data center. The ISP provides two different T3 connections to the Internet backbone. What type of connection must each of the animators and programmers have to access the VPN?
Term
local loop
Definition
Which of the following elements of the PSTN is most likely capable of transmitting only analog signals?
Term
In a remote switching facility
Definition
Where on the PSTN would you most likely find a DSLAM?
Term
None of the above
Definition
Which of the following WAN technologies operates at Layer 3 of the OSI model?
Term
data modulation
Definition
What technique enables DSL to achieve high throughput over PSTN lines?
Term
terminal adapter
Definition
On an ISDN connection, what device separates the voice signal from the data signals at the customer premises?
Term
the distance from the customer to the carrier’s switching facility
Definition
Which of the following may limit a DSL connection’s capacity?
Term
time division multiplexing
Definition
What technique does T1 technology use to transmit multiple signals over a single telephone line?
Term
active
Definition
In ____ scanning, the station transmits a special frame, known as a probe, on all available channels within its frequency range.
Term
Channel bonding
Definition
____ is an 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel.
Term
asymmetrical
Definition
Dial return satellite Internet access is a(n) ____ technology.
Term
interference
Definition
If intermittent and difficult-to-diagnose wireless communication errors occur, ____ might be the culprit.
Term
interference
Definition
If intermittent and difficult-to-diagnose wireless communication errors occur, ____ might be the culprit.
Term
Sequence Control
Definition
A unique characteristic of the 802.11 data frame is its ____ field.
Term
single
Definition
A directional antenna issues wireless signals along a(n) ____ direction.
Term
diffraction
Definition
In ____, a wireless signal splits into secondary waves when it encounters an obstruction.
Term
Interference
Definition
____ is a most significant problem for wireless communications because the atmosphere is saturated with electromagnetic waves.
Term
Client support
Definition
____ is one of the most important functions an NOS provides.
Term
LDAP
Definition
Naming (or addressing) conventions in Active Directory are based on the ____ naming conventions.
Term
GUI
Definition
A(n) ____ is a pictorial representation of computer functions that, in the case of NOSs, enables administrators to manage files, users, groups, security, printers, and so on.
Term
middleware
Definition
A piece of software called ____ translates requests and responses between a client and a server.
Term
server
Definition
A workgroup is a group of interconnected computers that share each other’s resources without relying on a central ____.
Term
UFS
Definition
Solaris employs the file system called ____ for its native file system type.
Term
thread
Definition
A(n) ____ is a self-contained, well-defined task within a process.
Term
logical
Definition
The printer queue is a ____ representation of the printer’s input and output.
Term
process
Definition
A(n) ____ is a routine of sequential instructions that runs until it has achieved its goal.
Term
domain
Definition
The directory containing information about objects in a domain resides on computers called ____ controllers.
Term
255.255.248.0
Definition
Convert the following subnet mask into its dotted-decimal equivalent: 11111111 11111111 11111000 00000000.
Term
supernetting
Definition
A node on a network has an IP address of 140.133.28.72 and its subnet mask is 255.248.0.0. What type of subnetting has been used on this network?
Term
254
Definition
If you worked on an older network that could not interpret classless addressing, and your network ID was 145.27.0.0, what is the theoretical maximum number of different subnets you could create on this network?
Term
255.255.255.0
Definition
You have decided to create 254 subnets on your Class B network. What subnet mask will you use to accomplish this?
Term
10.35.88.1
Definition
Your workstation's IP address is 10.35.88.12 and your supervisor's workstation's IP address is 10.35.91.4. When you send data from your workstation to your supervisor's workstation, what is the most likely IP address of the first default gateway that will accept and interpret your transmission?
Term
140.128.0.0 (or 10001100 10000000 00000000 0000000)
Definition
On a network with an IP address of 140.133.28.72 (or 10001100 10000101 00011100 01001000) and a subnet mask of 255.248.0.0 (or 11111111 11111000 00000000 00000000), what is the network ID?
Term
1
Definition
You have decided to use PAT on your small office network. At minimum, how many IP addresses must you obtain from your ISP in order for all five clients in your office to be able to access servers on the Internet?
Term
254
Definition
If you subdivide your Class B network into 254 subnets, what is the maximum number of hosts you can assign to any single subnet?
Term
255.0.0.0
Definition
What is the default subnet mask for a Class A network?
Term
nslookup jsmith
Definition
If you know that your colleague's TCP/IP host name is JSMITH, and you need to find out his IP address, which of the following commands should you type at your shell prompt or command prompt?
Term
MEGACO
Definition
Many network engineers consider ____ to be superior to MGCP.
Term
softphone
Definition
A computer programmed to act like an IP telephone is known as a(n) ____.
Term
toll bypass
Definition
Using VoIP over a WAN allows an organization to avoid paying long-distance telephone charges, a benefit known as ____.
Term
MGC
Definition
A(n) ____ is a computer that manages multiple media gateways.
Term
IP telephony
Definition
____ describes the use of any network to carry voice signals using the TCP/IP protocol.
Term
IP-PBX
Definition
In general, a(n) ____ is a private switch that accepts and interprets both analog and digital voice signals.
Term
streaming video
Definition
Among all video-over-IP applications, ____ is perhaps the simplest.
Term
call signaling and control
Definition
SIP and H.323 regulate ____ for VoIP or video-over-IP clients and servers.
Term
Convergence
Definition
____ is the use of one network to simultaneously carry voice, video, and data communications.
Term
DNS spoofing
Definition
In ____ , a hacker forges name server records to falsify his host’s identity.
Term
PGP
Definition
____ is a public key encryption system that can verify the authenticity of an e-mail sender and encrypt e-mail data in transmission.
Term
digital certificate
Definition
A(n) ____ is a password-protected and encrypted file that holds an individual’s identification information, including a public key.
Term
denial-of-service
Definition
A ____ attack occurs when a system becomes unable to function because it has been deluged with data transmissions or otherwise disrupted.
Term
man-in-the-middle
Definition
In a ____ attack, a person redirects or captures secure transmissions as they occur.
Term
authentication, authorization, and accounting
Definition
RADIUS and TACACS belong to a category of protocols known as AAA (____).
Term
concentrator
Definition
A VPN ____ authenticates VPN clients and establishes tunnels for VPN connections.
Term
flashing
Definition
A ____ attack occurs when an Internet chat user sends commands to a victim’s machine that cause the screen to fill with garbage characters and requires the victim to terminate their chat sessions.
Term
SSL
Definition
____ is a method of encrypting TCP/IP transmissions.
Term
Impedance
Definition
____ is the telltale factor for ascertaining where faults in a cable lie.
Term
protocol analyzer
Definition
The danger in using a ____ is that it could collect more information than you or the machine can reasonably process.
Term
Help desk coordinators
Definition
____ are often considered third-level support.
Term
Scope
Definition
____ is one of the most important aspects to consider when looking at how a problem solution might affect users and network functionality.
Term
promiscuous
Definition
To take advantage of network monitoring and analyzing tools, the network adapter installed in the machine running the software must support ____ mode.
Term
network monitor
Definition
A ____ is a software-based tool that continually monitors network traffic from a server or workstation attached to the network.
Term
Ghosts
Definition
____ are frames that are not actually data frames, but aberrations caused by a device misinterpreting stray voltage on the wire.
Term
supported services list
Definition
A ____ is a document (preferably online) that lists every service and software package supported within an organization, plus the names of first- and second-level support contacts for those services or software packages.
Term
jabber
Definition
A ____ usually results from a bad NIC.
Term
Giant
Definition
____ packets exceed the medium’s maximum packet size.
Term
RAID Level 3
Definition
In ____, parity error checking occurs when data is written across the disk array.
Term
Trojan horse
Definition
A program that disguises itself as something useful but actually harms your system is called a ____.
Term
online
Definition
A(n) ____ UPS uses the A/C power from the wall outlet to continuously charge its battery, while providing power to a network device through its battery.
Term
RAID Level 1
Definition
____ provides redundancy through a process called disk mirroring.
Term
bit
Definition
An archive ____ is a file attribute that can be checked or unchecked to indicate whether the file must be archived.
Term
Heuristic
Definition
____ scanning techniques attempt to identify malware by discovering “malware-like” behavior.
Term
NAS
Definition
____ is a specialized storage device or group of storage devices that provides centralized fault-tolerant data storage for a network.
Term
SONET rings
Definition
Mesh topologies and ____ topologies are good choices for highly available enterprise networks.
Term
polymorphic
Definition
A(n) ____ virus changes its characteristics every time it is transferred to a new system.
Term
workstation
Definition
A networked ____ is perhaps the simplest device to add.
Term
polling
Definition
The process where one network management console collects data from multiple networked devices at regular intervals is known as ____.
Term
Application
Definition
____ upgrades represent modifications to all or part of an application that are designed to enhance functionality or fix problems related to software.
Term
Application
Definition
____ upgrades represent modifications to all or part of an application that are designed to enhance functionality or fix problems related to software.
Term
patch
Definition
A ____ is a correction, improvement, or enhancement to a particular piece of a software application.
Term
asset
Definition
A key component in managing networks is identifying and tracking its hardware and software through ____ management.
Term
justify
Definition
Because backbone upgrades are expensive and time consuming, the first step in approaching such a project is to ____ it.
Term
Performance
Definition
____ management refers to monitoring how well links and devices are keeping up with the demands placed on them.
Term
network diagram
Definition
A(n) ____ is a graphical representation of a network’s devices and connections.
Term
backleveling
Definition
The process of reverting to a previous version of software after attempting to upgrade it is known as ____.