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Cisco CCNA 1

Cisco Networking Basics Studystack

QuestionAnswer
data network communication system between computers
network communication systems between computer capable of carrying more than just character information.
internet global network of computers and servers and networks.
download a package of information that one gets from online or network source.
instant messaging text communication between two people based on the previous IRC technology.
real-time communication that is happening quickly so that it mimicks real converstation.
blogs webpages that people publish information about themselves or topics individually online.
podcasts audio based medium that can be played cross platform and be easily distributed.
wikis a collaboration tool for housing large amounts of information needing to be used by many people.
Packet Tracer Cisco program to build virtual networks for learning purposes.
intranet internal network of computers
extranet internal network that can be accessed by external sources
wireless technology the tech that allows for network signals to be sent via the air or through to space.
standards rules for the normalization of technology across industries.
source originating device of a message.
router device that direct messages between networks
cloud symbol for computers outside the internal network and often the internet
TCP.IP Transmission control protocol and internet protocol
www http
email smtp or pop
instant message xmpp or oscar
ip telephone sip
HTTP Hypertext Transmission Protocol
SMTP Simple Mail Transport Protocol
POP Post Office Protocol
OSCAR Open System for Communication in Real-Time
SIP Session Initiation Protocol
network architecture refers to the conceptual plan for building a physical network
Fault Tolerance redundancies in a network that prevent one issue bringing down the network.
Scalability ability for a network to grow without redesign
internetwork two or more networks that combine with scalability
ISP Internet Service Provider
authentification requiring robust password protection
firewalls programs that prevent unauthorized access to a network or computer
single points of failure A point in the network that if lost would stop the whole network from working.
QoS Quality of Service
QoS Purpose Prevents packet loss on congested networks
bandwidth max internet speed or communication speed to a computer or internet connection.
Priority Queuing Process of putting some information processing before others.
authentication process used to verify the identity of a person or process
authoritative a source of information that is highly reliable.
back-off algorithm the retransmission delay used with CSMA.CD when a collision occurs. The algorith forces each sender that dtected the collisions to delay a random amount of time before attempting to retransmit.
bandwidth the networking, a measurement of the speed of bits that can be transmitted over a particular link.
best-effort Network protocol or technologies that do not use the acknowledgement system to guarantee reliable delivery of information.
binary a number system characterized by 1 or 0's
bit binary digit
bit time The time required to send a single bit over transmission medium. The time calculated as 1/speed where speed is the number of bits that can be sent over the medium.
bridge A device that connects multiple netowkr segments at the data link layer of the OSI model. Bridges were predecessor to LAN switches.
bridge table The table used by a swtich or bridge that associates MAC Addresses with the outoging port. The switch or bridge uses this bale for warding/filtering decisions.
bridging the process of forwarding frames in a switch or a bridge from one port to another port or from segment to segment
broadcast a form of tranmission where one device transmits to all devices within the network or on another network.
broadcast address An address used to represent a transmission from one device to all devices. In Ethernet, the special ethernet address FFFF.FFFF.FFFF us used as a destination MAC Address to cause a frame to be sent to all devices on the LAN.
broadcast domain A logical network composed of all the computers and networking devices the can be reached by sending a frame to the data link layer broadcast address.
burned in address BIA: The MAC address that is permanently assigned to a LAN interface or NIC. This address cannot be changed.
chache a temp storage where data has been retrieved or calculated and is accessed frequently can be stored.
carrier a signal on a medium used to support the transmission of data. Data is carried over the medium by modulation.
carrier sense multiple access CSMA: Medium Access Methodology in which a node is wishing to transmit listens for a carrier wave before trying to send.
Carrier Sense Multiple Access Collision Avoid CSMA/CA The MAC Algorithm used by ethernet devices in a shred media. The protocol requires a node wishing to transmit to listen for a carrier signal before trying to send. If a carrier sensed the node waitins for the transmission in progress to finis
channel a communication path over a meduim used to transport information from a sender to a receiver.
channel service unit/data service unit a device that connects a local digital telephone loop for a WAN circuit to a serial interface on a network device, typically connecting to a router.
Classful Addressing A unicast IP address that has 3 parts: a network part, a subnet part and a host part. This addressing is not generally practice in current network implementation.
Classless Addressing An IPv4 addressing scheme that uses a subnet mask. This allows for greater flexibility and is considered the best current addressing system.
client A network device that access a service on a another computer remotely.
cloud In networking a cloud symbol represents a part of the network whose details can be ignored.
Coaxial Cable Cable consisting of a hallow outer jacket around an insulator around a single conducting wire.
code group A group of code that meets a certain consider for entering a group.
Collaboration Tool This is software that allows for people to collaborate over a network or the internet.
collaborative Information system that allows for the creation of documents that can be edited by more than 1 person at a time.
collision In ethernet the result of 2 nodes transmitting at the same time. The signal is damaged when this happens.
collision domain An area within the network where collisions may occur.
connection-oriented Communication where the send and receiver must pre-arrange for communication to occur.
connectionless Any communication where the sender and receiver do not have to pre-arrange for their communication to occur.
console port A port on a Cisco device to while a terminal or computer is connected to a network device in order to communicate and configure that device.
control data Data that directs a process.
convergence A network that handles multiple different kinds of traffic and recognizes the network traffic and changes the routing based on the traffic.
crossover cable A UTP cable used in ethernet where some of the terminations are changed on the 2 RJ-45 ends.
CRC Cyclic Redundancy Check A type of has function or one way encryption that is used to producea small fixed-size checksum. This is used in communication to insure packet integrity.
daemon A computer program that runs in the background and us usually initaled as a process. Daemons often support server processes.
data Application layer protocol data unit
DCE Data Communication Equipment The devices and connection that make up a communications network. These are all the physical componenets of a network. This does not refer to the users end equipment.
data network A gigital network used to send data between computers.
DTE Data terminal equipment This is the user side equipment involved in getting information from a network or sending information onto a network or DCE.
decapsulation A process by which an end device begins sending the information backup through the OSI layers.
default gateway A device on a network that serves as an access point to otehr networks. This is used by the host to forward packets outside the network.
default route Routing table entry ths is used to direct frames for which a next hop is not explicitly listed in teh routing table.
delimiter This field of a fram signals the begining or end of a frame.
destination IP Address The Layer 3 address to which the data is going.
deterministic REfers to wheather the performance of a device can be accurately perdicted.
digital logic Also known as Boolean algedra. AND OR and IF
directed broadcast A term that descirbes and IPv4 packses sent to all host in a network.
directly connected network A network that is connected to a devices interface.
Dispersion The spreading of a light signal caused by light traveling at different speeds down the wires.
distrubuted A method of computer process in which each computer processes a smaller part of the data and then the information is recompiled.
DNS Resovler The client part of the DNS server mechanism. A DNS Resovles rcreates queries sent acress a network to a neame server and interprts the responses and returns information to the program requesting it.
domain name A dname as defined by DNS. This uniquely identifies a computer in the Internets. This also refer tot he part of the URL that identifies a single computer or organization like ciscopress.com
Domain Name Service An internet wide system by which a set of DNS servers collectively hold the name-ip addres mapping where we are able to resolve domain names.
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