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CTP2007
questions for CTP 2007 exam
138
Computer Science
Professional
07/27/2009

Additional Computer Science Flashcards

 


 

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Term
Convert binary to base 10: 10000000
Definition
Convert base 10 to binary: 128
Term
Convert binary to base 10: 11000000
Definition
Convert base 10 to binary: 192
Term
Convert binary to base 10: 11100000
Definition
Convert base 10 to binary: 224
Term
Convert binary to base 10: 11110000
Definition
Convert base 10 to binary: 240
Term
Convert binary to base 10: 11111000
Definition
Convert base 10 to binary: 248
Term
Convert binary to base 10: 11111100
Definition
Convert base 10 to binary: 252
Term
Convert binary to base 10: 11111110
Definition
Convert base 10 to binary: 254
Term
Convert binary to base 10: 11111111
Definition
Convert base 10 to binary: 255
Term
RS-232 · T1 · E1 · Ethernet · DSL · 802.11 PHY

At which OSI model layer do these functions occur?
Definition
Name 2 functions occur in layer 1 (Physical Layer) of the OSI model.
Term
This OSI model layer controls the delivery of frames and collision recovery
Definition
Describe layer 2 (Data link layer) of the OSI model
Term
IP · ICMP

At which OSI model layer do these functions occur?
Definition
Name 2 functions occur in layer 3 (Network Layer) of the OSI model
Term
TCP · UDP

At which OSI model layer do these functions occur?
Definition
Name 2 functions that occur in layer 4 (Transport Layer) of the OSI model
Term
This OSI model layer controls the opening and closing of data streams
Definition
Describe layer 5 (Session Layer) of the OSI model
Term
This OSI model layer that translates data via encryption or compression
Definition
Describle layer 6 (Presentation Layer) of the OSI model
Term
This OSI model layer is where most programs run
Definition
Describe layer 7 (Application Layer) of the OSI model
Term
OSI Model layer 1 - give the name
Definition
OSI Model Physical Layer - give the number
Term
OSI Model layer 2 - give the name
Definition
OSI Model Data Link Layer - give the number
Term
OSI Model layer 3 - give the name
Definition
OSI Model Network Layer - give the number
Term
OSI Model layer 4 - give the name
Definition
OSI Model Transport Layer - give the number
Term
OSI Model layer 5 - give the name
Definition
OSI Model Session Layer - give the number
Term
OSI Model layer 6 - give the name
Definition
OSI Model Presentation Layer - give the number
Term
OSI Model layer 7 - give the name
Definition
OSI Model Application Layer - give the number
Term
The OSI model layer that... defines the electrical and physical specifications
Definition
Description for the osi model Layer 1: Physical Layer
Term

The OSI model layer that...

 

  • uses frames
  • handles collisions
Definition
Description for the osi model Layer 2: Data Link Layer
Term

The OSI model layer that...

 

  • performs network routing functions
  • uses packets
Definition
Description for the osi model Layer 3: Network Layer
Term

Networking method with...

 

Speed: 100 Mbps

Max Length: 100 Meters

Cable: UTP

Connector: RJ-45

Definition

Fast Ethernet, 100baseT

 

Provide the following

Speed: ?

Max Length: ?

Cable: ?

Connector: ?

Term

Networking method with...

 

Speed: 1000 Mbps

Max Length: 100 Meters

Cable: UTP

Connector: RJ-45

Definition

Gigabit Ethernet (over copper), 1000baseT

 

Provide the following

Speed: ?

Max Length: ?

Cable: ?

Connector: ?

Term

Networking method with...

 

Speed: 10 Mbps

Max Length: 100 Meters

Cable: UTP

Connector: RJ-45

Definition

Twisted Pair Ethernet, 10baseT

 

Provide the following

Speed: ?

Max Length: ?

Cable: ?

Connector: ?

Term

Networking method with...

 

Speed: 10 Mbps

Max Length: 185 Meters

Cable: RG-58 type coax

Connector: BNC

Impedance: 50 ohm

Definition

Thin Ethernet , 10 base 2

 

Provide the following

Speed: ?

Max Length: ?

Cable: ?

Connector: ?

Impedance: ?

Term

Networking method with

 

Speed: 10 Mbps

Max Length: 500 Meters

Cable: RG-8 type coax

 

Definition

Thick Ethernet, 10 base 5

 

Provide the following

Speed: ?

Max Length: ?

Cable: ?

Term

Carrier Sense Multiple Access/Collision Detect (CSMA/CD)

 

 

Describe two features of CSMA/CD

Definition

Protocol that:

  • Detects collisions
  • Backoff/Retry if collisions are detected
Term

Provide two aspects of a bus network topology

Definition

Networking system

 

  • Where everyone on a LAN shares the same signal
  • Collisions can occur between users
Term

ADSL traits

 

Download:?

Upload:?

Max Distance:?

Definition

Type of DSL with the following traits

 

Download: 6 Mbps download

Upload: 640 kbps upload

Max distance: 3km

Term

ADSL lite

aka universal DSL

 

Provide the following:

Download: ?

Upload: ?

Max Distance: ?

Definition

Type of DSL with

 

Download: 1.5 Mbps download

Upload: 512 kbps upload

Max Distance: 3km from provider

Term

RADSL (Rate Adaptive DSL)

 

What is the key feature of RADSL?

Definition
Type of DSL with a speed that adjusts to meet conditions
Term

VDSL (Very High Bitrate dsl)

 

Provide the following:

Upload:?

Download:?

Distance:?

Definition

Type of DSL with

 

Download: 52 Mbps

Upload: 16 Mbps upload

Distance: 300m with slower speeds as the distance increases

Term

Symetric DSL traits

aka Single line DSL

 

Provide the following:

Download: ?

Upload: ?

Distance: ?

Definition

Type of DSL with

 

Download: 2 Mbps

Upload: 2 Mbps upload

Distance: 3km

Term

DSL

 

Provide the following:

Transmission type: ?

Network: ?

Definition

What technology provides:

 

Transmission type: digital

Network: the local telephone network

Term
What are EVDO and HSDPA
Definition
Name two Cellular data networking standards
Term
Packet switching aka datagram switching
Definition
network communications method that groups all transmitted data, irrespective of content, type, or structure into suitably-sized blocks
Term
What is the main limitation of circuit switching?
Definition

Switching technology where:

 

Each call takes a full channel

Term
Bus topology
Definition
Network topology where a set of clients are connected via a shared communications line
Term
Star network topology
Definition
LAN in which all nodes are connected to one central node that routes all data passing to and from them.
Term
Mesh network topology
Definition
A communications network in which there are at least two pathways to each node. If one of the paths fails, the other is still available.
Term
MAN
Definition
large computer networks usually spanning a city
Term
WAN
Definition
computer network that covers a broad area
Term
Define Authentication server
Definition
Server type that allows users to log in for access to network resources
Term
File server
Definition
Server type that allows users to share files
Term
Media server
Definition
Server type that that processes the audio and/or video streams associated with telephone calls
Term
POE (Power over ethernet)
Definition

This technology provides:

 

Electrical power, along with data over category 5 cable in an Ethernet network

Term
Power Sourcing Equipment (PSE)
Definition
The name of the device that provides the power for POE
Term
Endspan PSE
Definition
The name used for a switch that provides POE
Term
Midspan PSE
aka Power injector
Definition
PSE Device located between the switch and the ethernet client that provides power over ethernet
Term
IEEE 802.3-2005 Clause 33
Definition
IEEE Power over ethernet standard
Term
PD (Powered device)
Definition
Device that uses power over ethernet
Term
The meaning of the abreviation AP
Definition
Abreviation used for wireless access point
Term
Thick AP
Definition
Feature rich wireless access point
Term
Thin AP
Definition
Feature limited wireless access point that uplinks to a wireless controller
Term
Modem
Definition
Device that converts digital signals to analog for transmission over phone lines
Term
Carrier sense (CS)
Definition
The type of technology used when a transmitter listens for a carrier wave before trying to send.
Term
Multiple access (MA)
Definition
Term that describes a situation where many stations can send and receive on the same medium.
Term
How does CSMA/CD reduce collisions?
Definition
Collision prevention Technology that is used by wired networking that:

Detects collisions by observing the traffic on the wire
Term
How does CSMA/CA work (3 steps)
Definition
Collision prevention Technology that is used by wireless that:

1) Listens and Waits for an idle period
2) Sends data
3) Waits for an ACK from the recipient
Term
IEEE 802.3
Definition
IEEE Ethernet standard
Term
PHY
Definition
Abreviation used for the physical later of the network
Term
IEEE 802.11
Definition
IEEE wireless standard
Term
Ethernet frame
Definition
Name used for data sent at layer 2 and below. One bit at a time is on the wire.
Term
802.3 Preamble
Definition
7 bytes of alternating 1 and 0 at the start of an ethernet frame
Term
Name the 7 parts of a standard ethernet frame
Definition
Type of frame with...
7 byte preamble
1 byte SOF (start of frame)
6 byte destination MAC address
6 byte source MAC address
2 byte length field
46-1500 bytes of data
4 byte CRC (Check sum)
Term
Name the 9 parts of a tagged ethernet frame
Definition
Type of frame with...
7 byte preamble,
1 byte SOF (start of frame),
6 byte destination MAC address,
6 byte source MAC address,
2 byte length field,
2 byte tag control info,
2 byte MC-Length/TagType,
46-1500 bytes of data,
4 byte CRC (Check sum)
Term
What is IEEE 802.1Q
Definition
IEEE Ethernet bridging standard that is used for VLANs (aka tagging)
Term
FCS (Frame check sequence)
Definition
Number that  is calculated based on the contents of a frame which is used to verify its integrity.
Term
What is Half duplex ethernet
Definition
Type of ethernet where both sending and recieving is done over the same pair.  The station can be either sending or recieving (but not both at the same time).
Term
What is Full duplex ethernet
Definition
Type of ethernet that allows two stations to simultaneously send and recieve data 
Term
backoff delay
Definition
Random amount of time that a station waits following a collision before transmitting again
Term

IEEE standard for wireless half duplex ethernet.

 

 

Definition
802.11 Wireless lan Is it Half or Full duplex?
Term
 802.11 Management frames
Definition
Group name for 802.11 frames that enable stations to establish and maintain communications
Term
802.11 Control frames
Definition
Group name for 802.11 frames that assist in the delivery of data frames between stations
Term
802.11 Data frames
Definition
Group name for 802.11 frames that carry packets from higher layers, such as web pages, printer control data, etc., within the body of the frame.
Term
Authentication frame
Definition
Frame type used in a process whereby an access point either accepts or rejects the identity of a radio NIC. Used with 802.11
Term
Deauthentication frame
Definition
Frame type sent to another station if it wishes to terminate secure communications. Used with 802.11
Term
802.11 Beacon frame
Definition
802.11 frame sent periodically from an access point to announce its presence and provide the SSID
Term
802.11 Acknowledgement (ACK) frame
Definition
802.11 frame - After receiving a data frame, the receiving station will send one of these frames to the sending station if no errors are found. If the sending station doesn't receive one of these frames within a predetermined period of time, the sending station will resend the data frame.
Term
802.11 Request to Send (RTS) frame
Definition
802.11 frame - A station sends one of these frames as the first step in a two-way handshake required before sending data frames.
Term
802.11 Clear to Send (CTS) frame
Definition
802.11 frame - a station responds to an RTS frame with one of these frames. It provides clearance for the requesting station to send a data frame. This frame provides collision control management by including a time value for which all other stations are to hold off transmission while the requesting stations transmits
Term
802.11 Data frame
Definition
802.11 frames that carry packets from web pages, files, etc. within the body
Term
SSID (Service set identifier)
Definition
32 character friendly name that identifies a particular 802.11 wireless LAN.
Term
Radio frequency band
Definition
a small section of the spectrum of radio communication frequencies, in which channels are usually used or set aside for the same purpose.
Term
Wireless channel
Definition
A frequency range of a wireless band that is the right size for one WLAN to operate in. The analogy is how one Tv station uses a portion of the television band for its broadcast signal.
Term
personal area network (PAN)
Definition
computer network used for communication among computer devices (including telephones and personal digital assistants) close to one's person.
Term
Bluetooth
Definition
Wireless protocol for exchanging data over short distances from fixed and mobile devices
Term
Bridge
Definition
An intelligent device used to extend the layer 2 network over a distance (not a switch but similar to one)
Term
Flat network
Definition
A network in which all stations can reach other without going through any intermediary hardware devices, such as a bridge or router
Term
Three-layered model (aka tiered)
Definition
The division of networking equipment into three groups (Core, Distribution & Access) in order to provide a more reliable design
Term

802.11b stats

 

Provide the following:

Speed, frequency, Indoor range, Outdoor range

Definition
Wireless technology with 11MBPS Maximum data rate that operates in the 2.4Ghz band. Max range indoor=150' outdoor=300'
Term

802.11a stats

 

Provide the following:

Speed, frequency, Indoor range, Outdoor range

Definition
Wireless technology with 54MBPS Maximum data rate that operates in the 5Ghz band. Max range indoor=50' outdoor=100'
Term

802.11g stats

 

Provide the following:

Speed, frequency, Indoor range, Outdoor range

Definition
Wireless technology with 54MBPS Maximum data rate that operates in the 2.4Ghz band. Max range indoor=150' outdoor=300'
Term
Token ring IEEE 802.5
Definition
This local area network (LAN) technology that uses a special three-byte frame called a token that travels around the ring. The frames travel completely around the loop.
Term
IEEE 802.5 - What LAN technology uses this RFC?
Definition
Token ring protocol - What is the IEEE RCF number?
Term

FDDI stats

 

speed, range (for both types)

Definition
Fiber optic LAN technology with a speed of 100 MBPS and a maximum range of 1.2 (single mode) or 18.6 miles (multimode)
Term
point-to-point
Definition
A communications or network system in which two connected entities pass data only to each other
Term
Point to point (PTP) WAN link
Definition
Provides a single, pre-established WAN communications path from the customer premises through a carrier network, such as a telephone company, to a remote network.
Term
HDLC and PPP are commonly used for this
Definition
Name two Wan link protocols (that aren't packet-switched)
Term
What is PPP used for?
Definition
Protocol used for dialup 56k modems, ISDN as well as some WAN links
Term
Frame relay, ATM and MPLS are examples of
Definition
Name three common packet switched WAN links
Term
Type of frame relay service that is always connected
Definition
What is a permanent virtual circuit (PVC)
Term
Temporary connections used in situations requiring only sporadic data transfer between DTE devices across the Frame Relay network.
Definition
What are switched virtual circuits (SVC)
Term
data communication equipment (DCE)
Definition
The side of an interface that represents the provider of a data communication. For example a modem
Term
Data Terminating Equipment (DTE)
Definition
Telco term for the source of the signals on a network.  It is typically a terminal or computer.
Term
ATM
Definition
A packet switching protocol that encodes data into small fixed-sized cells
Term
virtual circuit
Definition
A logical, rather than a physical, circuit.
Term

Frame relay

 

Provide two main characteristics

 

Definition

Wan link protocol with the following charactersitics

 

1) Data passes through multiple node points

2) It does not include error correction

Term
x.25
Definition
One of the oldest packet-switched services available
Term
Packet switching
Definition
Refers to protocols in which messages are divided into packets before they are sent. Each packet contains a destination address.
Term
Circuit switching
Definition
A type of communications in which a dedicated channel is established for the duration of a transmission.
Term

TCP-IP model

 

Name the layers

Definition

What is this?

 

1) Link (aka Network interface)

2) Internet

3) Transport

4) Application

Term
TCP-IP model layer 1 Link layer
Definition
TCP-IP model layer that specifies details of how data is physically sent through the network
Term

TCP-IP model layer 2 Internet layer

 

Define and name a protocol that works on this layer

Definition

TCP-IP model layer that packages data into IP datagrams, which contain source and destination address information

 

IP, ICMP, ARP, RARP

Term

TCP-IP model layer 3 Transport layer

 

Define and name a protocol that works on this layer

Definition

TCP-IP model layer that provides communication session management between host computers.

 

TCP, UDP, RTP

Term
TCP-IP model layer 4 Application
Definition

TCP-IP model layer that defines how host programs interface with transport layer services to use the network.

 

HTTP, Telnet, FTP, TFTP, SNMP, DNS, SMTP, X Windows, etc

Term
IANA
Definition
The group the assigns public IP addresses
Term
Network address translation (NAT)
Definition
Method used to map one or more internal IP addresses to an external IP address
Term
Classless Inter-Domain Routing (CIDR)
Definition
An IP address is interpreted in two parts: a network-identifying prefix followed by a host address within that network. Example 192.168.0.1/24 The number after the slash indicates how many bits are masked by the subnet mask
Term
Subnet
Definition
An IP address is divided into two logical parts (network and host).  This term is used to describe all of the computers with the same network address.
Term
Subnet mask
Definition
A value which when compared to an IP address will provide the network and host portions of the address.
Term

TCP segment

 

Give another name for a TCP segment

Definition

TCP Packet

 

Give another name for a TCP packet

Term
Real-time Transport Protocol (RTP)
Definition
A standardized packet format for delivering audio and video over the Internet
Term
RTP Control Protocol (RTCP)
Definition
The protocol that manages real time communications
Term
Name two features of UDP
Definition

Protocol with the following features:

 

Lightweight

Unreliable

 

Term
ICMP
Definition
designed for sending control and test messages across IP networks. Known for the "ping" command.
Term
FTP
Definition
Common protocol for exchanging files over the Internet
Term
HTTP
Definition
The protocol that is used to access web pages.
Term
DNS
Definition
An Internet service that runs on a server and translates domain names into IP addresses. For example: It maps "google.com" to the IP address "74.125.67.100"
Term

DHCP

 

What are the main three things that it provides?

 

Explain the two step process?

Definition

A protocol that primarily provides these three things to the clients on a network:

  1. Assigning dynamic IP address
  2. Subnet mask 
  3. default gateway

It follows this two step process:

  1. Discovery - Client sends an IP broadcast requesting an IP address
  2. Offer- A server provides the IP address to the client.
Term
BootP
Definition
Protocol designed for providing startup information (including IP address) to diskless workstations.
Term
Centralized network model
Definition
Network model which puts all of the servers in the same physical location.
Term
Decentralized network model
Definition
Network model which puts the servers in more than one physical location. Typically the servers are located near to their clients.
Term
Jam signal
Definition
A signal send when CSMA/CD detects a collision
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