Term window Definition The term window represents the number of bytes that can be sent without receiving an acknowledgment. The majority of pages are undamaged with minimal creasing or tearing, minimal pencil underlining of text, no highlighting of text, no writing in margins. Some router run the image directly from flash memory though. Because the telco does not sell a physical cable between the two endpoints, instead charging a monthly fee for the ability to send bit between the two sites, the service is considered to be a leased service. Term partial mesh Definition A network topology in which more than two devices could physically communicate but, by choice, only a subset of the pairs of devices connected to the network is allowed to communicate directly.
Term ping Definition Packet Internet groper. Definition Load and run the bootstrap code Term What is step 3 when powering on a Cisco Router? Term authorization Definition In security, the determination of the rights allowed for a particular user or device. Youve learned the concepts, you have the experience to put them to real-world use, and now you want to practice, practice, practice until exam time. Term single-mode Definition A type of fiber-optic cabling with a narrow core that allows light to enter only at a single angle. Term balanced hybrid Definition A term that refers to a general type of routing protocol algorithm, the other two being distance vector and link state. Term denial of service DoS Definition A type of attack whose goal is to cause problems by preventing legitimate users from being able to access services, thereby preventing the normal operation of computers and networks.
Term clocking Definition The process of supplying a signal over a cable, either on a separate pin on a serial cable or as part of the signal transitions in the transmitted signal, so that the receiving device can keep synchronization with the sending device. This route identifies the outgoing interface of the router, and possibly the next-hop router. In software, the bit position is set by specifying a hexadecimal value using configuration commands. Term four-wire circuit Definition A line from the telco with four wires, composed of two twistedpair wires. A media-access mechanism that defines how devices decide when they can send, with a goal of avoiding collisions as much as possible.
The model consists of seven layers, each of which specifies particular network functions, such as addressing, flow control, error control, encapsulation, and reliable message transfer. Term web server Definition Software, running on some computer, that stores web pages and sends those web pages to web clients web browsers that request the web pages. Definition False Term What happends to the configurations when you copy from tftp to the running-config? Numerically, the address has the same value as the network number in the network part of the address, and all 255s in the host octets—for example, 10. The imposition of time ordering on a bit stream. Term subnet broadcast address Definition A special address in each subnet, specifically the largest numeric address in the subnet, designed so that packets sent to this address should be delivered to all hosts in that subnet. Term link state Definition A classification of the underlying algorithm used in some routing protocols.
Quick Reference SheetsAll exam topics are covered for a quick review and refresh in the nearly 100 graphical quick reference sheets. At the source, a modem converts digital signals to a form suitable for transmission over analog communication facilities. Although the authors of this site have made every effort to ensure the information on this website is correct, the authors do not assume and hereby disclaim any liability to any party for loss or damage caused by errors, omissions or misleading information. A technique of encoding analog voice into a 64-kbps data stream by sampling with 8-bit resolution at a rate of 8000 times per second. The address ranges are: 10. Term full duplex Definition Generically, any communication in which two communicating devices can concurrently send and receive data.
Step 3 - The sender s listen s to make sure that no collision occurred. Term switched Ethernet Definition An Ethernet that uses a switch, and particularly not a hub, so that the devices connected to one switch port do not have to contend to use the bandwidth available on another port. Try each boot system command in the startup-config file, in order, until one works. Flash CardsMore than 400 flash cards in print and online are available in customizable sets that you can tailor to your study needs. Term encapsulation Definition The placement of data from a higher-layer protocol behind the header and in some cases, between a header and trailer of the next-lower-layer protocol.
Typically used in labs to build serial links without the expense of an actual leased line from the telco. A device that understands the Layer 1 details of serial links installed by a telco and how to use a serial cable to communicate with networking equipment such as routers. Understanding Ethernet and Switch Operation 4. An interface in this state should be able to pass data-link frames. Practically, both sides agree to the same speed, but there is no check or adjustment of the rates if they are slightly different. Term administrative distance Definition In Cisco routers, a means for one router to choose between multiple routes to reach the same subnet when those routes were learned by different routing protocols. The result is another one-digit binary number.
Quick Reference Sheets All exam topics are covered for a quick review and refresh in the nearly 100 graphical quick reference sheets. Term update timer Definition A timer used by a router to indicate when to send the next routing update. Term synchronous Definition The imposition of time ordering on a bit stream. Term keepalive Definition A proprietary feature of Cisco routers in which the router sends messages on a periodic basis as a means of letting the neighboring router know that the first router is still alive and well. Each pair is used to send in one direction, so a four-wire circuit allows fullduplex communication. Term half duplex Definition Generically, any communication in which only one device at a time can send data. A simple document-formatting language that uses tags to indicate how a given part of a document should be interpreted by a viewing application, such as a web browser.
It must be from global config. A group of devices, connected to one or more switches, with the devices grouped into a single broadcast domain through switch configuration. Quick Reference Sheets All exam topics are covered for a quick review and refresh in more than 100 graphical quick reference sheets. Term boot field Definition The low-order 4 bits of the configuration register in a Cisco router. The access link uses the same physical layer standards as do point-to-point leased lines.
Term pinout Definition The documentation and implementation of which wires inside a cable connect to each pin position in any connector. A common name for the suite of protocols developed by the U. At the destination, the analog signals are returned to their digital form. An integrated circuit device that transforms analog voice signals into a digital bit stream and then transforms digital signals back into analog voice signals. They arrived within a week and they worked just great. A serial communication circuit between two points, provided by some service provider, typically a telephone company telco.