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74 Cards in this Set
- Front
- Back
Provides interface between software applications and network for interpreting application requests and requirements.
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Application Layer Function
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Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls
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Application Layer Hardware
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BOOTP, DHCP, DNS, FTP, HTTP, HTTPS, IMAP4, PING, POP3, NSLOOKUP, NTP, SFTP, SMTP, Telnet, TFTP
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Application Layer Protocols and Standards
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Application Layer Number
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7
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Allows hosts and applications to use a common language; performs data formatting, encryption, and compression
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Presentation Layer Function
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Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls
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Presentation Layer Hardware
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MIME, SSL, TLS
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Presentation Layer Protocols and Standards
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Presentation Layer Number
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6
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Establishes, Maintains, and Terminates user connections
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Session Layer Function
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Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls
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Session Layer Hardware
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RTP, SIP
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Session Layer Protocols and Standards
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Session Layer Number
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5
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Ensures accurate delivery of data through flow control, segmentation and reassembly, error correction, and acknowledgment
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Transport Layer Function
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Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls
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Transport Layer Hardware
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TCP, UDP
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Transport Layer Protocols and Standards
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Transport Layer Number
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4
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Establishes network connections; translates network addresses into their physical counterparts and determines routing
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Network Layer Function
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Routers, Layer 3 Switches, Firewalls, Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls
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Network Layer Hardware
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ARP, ICMP, IGMP, IP, IPSec, RARP
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Network Layer Protocols and Standards
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Network Layer Number
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3
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Packages data in frames appropriate to network transmission method
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Data Link Layer Function
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Bridges, Switches, Wireless access points, NICs, Modems, Cable Modems, DSL Modems, Gateways, Proxy Servers, Application Switches, Content Filtering Firewalls
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Data Link Layer Hardware
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L2TP, PPP, PPTP, SLIP
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Data Link Layer Protocols and Standards
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Data Link Layer Number
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2
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Manages signaling to and from physical network connections
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Physical Layer Function
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Hubs, Repeaters, NICs, Modems, Cable Modems, DSL Modems
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Physical Layer Hardware
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IEEE 802.3 (Ethernet)
802.5 (Token Ring) 802.11 (Wi-Fi) |
Physical Layer Protocols and Standards
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Physical Layer Number
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1
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An Application layer protocol in the TCP/IP suite that uses a central list of IP addresses and their associated devices' MAC addresses to assign IP addresses to clients dynamically. It was the precursor to DHCP
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BOOTP (Bootstrap Protocol)
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An Application layer protocol in the TCP/IP suite that manages the dynamic distribution of IP addresses on a network. Using it to assign IP addresses can nearly eliminate duplicate-addressing problems.
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DHCP (Dynamic Host Configuration Protocol)
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A hierarchical way of tracking domain names and their addresses, devised in the mid-1980s. Its database does not rely on one file or even one server, but rather is distributed over several key computers across the internet to prevent catastrophic failure if one or a few computers go down. It is a TCP/IP service that belongs to the Application layer of the OSI model.
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DNS (Domain Name System or Domain Name Service)
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An Application layer protocol used to send and receive files via TCP/IP
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FTP (File Transfer Protocol)
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An Application layer protocol that formulates and interprets requests between Web clients and servers.
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HTTP (Hypertext Transfer Protocol)
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The URL prefix that indicates that a Web page requires its data to be exchanged between client and server using SSL encryption. Uses the TCP port number 443, rather that port 80
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(HTTP over Secure Sockets Layer)
HTTPS |
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the most commonly used form of Internet Message Access Protocol (IMAP).
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(Internet Message Access Protocol, version 4)
IMAP4 |
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A TCP/IP troubleshooting utility that can verify that TCP/IP is installed, bound to the NIC, configured correctly, and communicating with the network. It uses ICMP to send echo request and echo reply messages that determine the validity of an IP address.
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(Packet Internet Groper)
PING |
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The most commonly used form of the Post Office Protocol. An Application Layer protocol used to retrieve messages from a mail server. When a client retrieves mail via POP, messages previously stored on the mail server are downloaded to the client's workstation, and then deleted from the mail server.
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(Post Office Protocol, version 3)
POP3 |
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A TCP/IP utility that allows you to look up the DNS host name of a network node by specifying its IP address, or vice versa. This ability is useful for verifying that a host is configured correctly and for troubleshooting DNS resolution problems.
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NSLOOKUP
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A simple Application layer protocol in the TCP/IP suite used to synchronize the clocks of computers on a network. It depends on UDP for Transport layer services
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(Network Time Protocol)
NTP |
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A protocol available with proprietary version of SSH that copies files between hosts securely. Like FTP, it first establishes a connection with a host and then allows a remote user to browse directories, list files, and copy files. Unlike FTP, it encrypts data before transmitting it.
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(Secure File Transfer Protocol)
SFTP |
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The Application layer TCP/IP subprotocol responsible for moving messages from one e-mail server to another.
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(Simple Mail Transfer Protocol)
SMTP |
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An Application layer protocol in the TCP/IP suite used to convey data regarding the statusof managed devices on a network.
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(Simple Network Management Protocol)
SNMP |
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A terminal emulation protocol used to log on to remote hosts using the TCP/IP protocol. It resides in the Application layer of the OSI model.
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Telnet
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Application layer protocol that enables file transfers between computers. Unlike FTP, it relies on UDP at the Transport layer and does not require a user to log on to the remote host.
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(Trivial File Transfer Protocol) A TCP/IP
TFTP |
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A standard for encoding and interpreting binary files, images, video, and non-ASCII character sets within an e-mail message.
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(Multipurpose Internet Mail Extensions)
MIME |
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A method of encrypting TCP/IP transmissions-including Web pages and data entered into Web forms-en route between the client and server using public key encryption technology.
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(Secure Sockets Layer)
SSL |
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A version of SSL being standardized by the IETF (Internet Engineering Task Force). With it, the IETF aims to create a version of SSL that encrypts UDP as well as TCP transmissions. It, which is supported by new Web browsers, uses slightly different encryption algorithms than SSL, but otherwise is very similar to the most recent version of SSL.
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(Transport Layer Security)
TLS |
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A Transport layer protocol used with voice and video transmission. it operates on top of UDP and provides information about packet sequence to help receiving nodes detect delay and packet loss. It also assigns packets a timestamp that corresponds to when the data int he packet was sampled from the voice or video stream. This timestamp helps the receiving node synchronize incoming data.
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(Real-time Transport Protocol)
RTP |
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Which of the following is an example of a MAC address?
BB:BB:BB:BB:BB:BB:BB:BB 131.54.34.141 131.0.0.3 02:45:FD:1C:E6:31 |
02:45:FD:1C:E6:31
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Prior to the OSI model different vendors
worked together to standardize products transmitted data using the same set of rules used a variety of transmission methods had the same set of rules for data transmission |
used a variety of transmission methods
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Plug and Play compatibility refers to a function that
is not supported by the OSI Model was first developed by IBM requires user intervention or installation of software None of the above. |
None of the above.
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If data is transmitted using a snychronous bit method, a _________ signal is part of the transmission.
start bit end bit timing clocking |
clocking
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The OSI model was designed to provide
a standardized framework for data communications a non-standard model for data processing a framework for the Internet a way of identifying uncommon elements that enabled transfer |
a standardized framework for data communications
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In the on state, a bit of data is set to
3 2 1 0 |
1
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In an effort to predict future network needs, the ISO created the open model in beta format during the late
1960s 1970s 1980s 1990s |
1970s
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A timing function that allows devices to understand when the signal starts and stops is
bit synchronization bit monitoring coordinated transmission None of the above. |
bit synchronization
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________ is a topology of a network that requires a central switch or a hub and drop cables to each node on the segment.
Mesh Star Bus Ring |
Star
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ISO is an acronym for
International Services Organization International Standards Organization International Systems Office None of the above. |
International Standards Organization
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Which of the following is an example of the type of information that may be included in the header?
source address destination address port number All of the above. |
source address
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Which layer(s) is(are) involved in getting informaiton that you enter into an application on your computer transmitted across the network to another computer?
Application layer only layers 1, 2, and 3 only only the Transport layer all layers |
all layers
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A category of digital encoding schemes is
amplitude current-state encoding phase shift keying frequency shift keying |
amplitude
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The OSI Model contains _______ layers.
7 8 9 11 |
7
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A function that moves a packet from the source machine to the destination machine across multiple networks is called a
router connector delivery connection None of the above. |
router
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As data moves through different layers of the OSI model, each layer adds a
footnote token packet layer header |
header
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Which of the following layers is responsible for handling the logical address of network devices and packet routing?
Data Link Physical Network Transport |
Network
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At the Application (layer)level, the data is called
PDUs packets frames bits |
PDUs
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Stress on a transmitted signal causes degradation which is known as
deflagration distortion attenuation amplification |
attenuation
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Which of the following are clocking methods?
guaranteed state change separate clock signals over sampling All of the above. |
over sampling
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The OSI model
specifies a framework for data transmission defines specific criteria for protocols and devices requires that vendors adhere to the characteristics of each layer does not support Plug and Play |
specifies a framework for data transmission
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The OSI layer that turns data from upper layers into bits for transmission is called
Presentation Transport Data Link Network |
Data Link
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There are _____ major topologies, excluding wireless.
8 6 4 2 |
4
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When using baseband transmissions _________ use(s) the entire capacity of the media to send the data.
two signals four signals one signal many signals |
one signal
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The purpost of the ISO is to _________ standards throughout the world.
eliminate unify revise diversify |
unify
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A ________ signal allows the sending and receiving nodes to get in synch with each other and identify the beginning and enc of a transmitted message.
clocking timing end bit start bit |
clocking
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