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36 Cards in this Set
- Front
- Back
data
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application layer PDU
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source device
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the device that is originating the PDU
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DNS
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Domain Name System: an internet-wide system by which a hierarchical set of DNS servers collectively hold all the name-IP address mappings, with DNS servers referring users to the correct DNS server to successfully resolve a DNS name
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RFC
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Request for Comment: a series of documents and memoranda encompassing new research, innovations, and methodologies applicable to Internet technologies
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syntax
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the structure and order of words in a computer language
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session
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a related set of communications transactions between two or more network devices
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client
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a network device that accesses a service on another computer remotely by accessing the network
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server
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computer hardware that is to be used by multiple concurrent users. also, software that provides service to many users.
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daemon
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a computer program that runs in the background and is usually initiated as a process. often support server processes
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peer
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a host or node that participates in some form of a group. both have server and client components
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scheme
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a plan, design, or program of action to be followed. addressing plans are called addressing scheme
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IP address
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a 32-bit number, written in dotted decimal notation, used by the IP to uniquely identify an interface connected to an IP network. also a destination address in an IP header to allow routing
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domain name
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a name that uniquely identifies a computer in the internet. DNS servers respond with the corresponding IP address that is used by the computer with that domain name.
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network address
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a dotted decimal number defined by the IPv4 protocol to represent a network or subnet. represents the network that hosts reside in.
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resource record
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DNS data records. RFC 1035. Name, Class, Type. and Data
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DNS resolver
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the client part of the DNS client-server mechanism. creates queries sent across a network to the name server, interprets responses and returns information to the requesting programs
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nslookup
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a service or a program to look up information in the DNS
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query
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a request for information, answered with replies.
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cache
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a temporary storage where data that has been retrieved or calculated and is accessed frequently can be stored
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authoritative
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a source of information that is highly reliable and known for its accuracy
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plug-in
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an application a browser uses to display some type of content
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HTTP
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hypertext transfer protocol: defines the commands, headers, and processes by which web servers and browsers transfer files
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distributed
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a method of computer processing in which different parts of a program run simultaneously on two or more computers that are communicating with each other over a network
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collaborative
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information systems that allow the creation of a document or documents that can be edited by more than one person in real time
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encryption
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the process of obscuring information to make it unreadable without special knowledge, using encryption key
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POP
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a protocol that allows a computer to retrieve e-mail from a server typically not used by end users
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SMTP
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an application protocol typically not used by end users. instead, it is used by the network management software and networking devices to allow monitoring and troubleshooting
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MUA
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mail user agent: program used to download and send e-mail. e-mail clients use POP3 to receive e-mails and use SMTP to send e-mails.
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spam
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unsolicited commercial e-mail
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gateway
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different kinds of networking devices
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DHCP
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dynamic host configuration protocol: protocol used to dynamically assign IP configurations to hosts. assigns IP addresses, default gateway, and DNS servers to network host
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subnet mask
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a dotted decimal number that helps identify the structure of IP addresses. the mask represents the network and subnet parts of related IP addresses with binary 1s and the host part of related IP addresses with binary 0s
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broadcast
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transmission where one device transmits to all devices within the network or on another network
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SMB
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Server Message Block: an application-level network protocol mainly applied to shared access files, printers, serial ports, and miscellaneous communications between nodes
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UNIX
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a multiuser multitasking operating system originally devloped in the 1960s by a group of AT&T employees at Bell Labs.
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IAC
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interpret as command: in Telnet application, commands are always introduced by a character with the deimal code 255, known as an Interpret as Command character
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