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Cisco CCNA 1
Cisco Networking Basics Studystack
| Question | Answer |
|---|---|
| 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 |
| 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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