Connect a power cable from a power outlet to the power port on the router. The number of bits of value binary 1 in the mask is considered to be the prefix length. 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. Quick Reference SheetsAll exam topics are covered for a quick review and refresh in the nearly 100 graphical quick reference sheets. The access link uses the same physical layer standards as do point-to-point leased lines. Term bus Definition A common physical signal path composed of wires or other media across which signals can be sent from one part of a computer to another.
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 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. Understanding Ethernet and Switch Operations 4. Term broadcast domain Definition A set of all devices that receive broadcast frames originating from any device within the set. Term T1 Definition A line from the telco that allows transmission of data at 1. Definition no cdp run Term How do you stop an interface from sending cdp information when it is called? Term four-wire circuit Definition A line from the telco with four wires, composed of two twistedpair wires. Introducing Local Area Networks 3.
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. If two devices transmit at once, a collision occurs and is detected by all colliding devices. Term configuration register Definition In Cisco routers, a 16-bit, user-configurable value that determines how the router functions during initialization. Hubs do not interpret the electrical signals as a frame of bits, so hubs are considered to be Layer 1 devices. Term routing protocol Definition A set of messages and processes with which routers can exchange information about routes to reach subnets in a particular network. Term network Definition A collection of computers, printers, routers, switches, and other devices that can communicate with each other over some transmission medium.
Practically, a device will try to use the same speed as another device on the other end of a serial link. We customize your eBook by discreetly watermarking it with your name, making it uniquely yours. A protocol that provides router-to-router and host-tonetwork connections over synchronous point-to-point and asynchronous point-topoint circuits. A serial communication circuit between two points, provided by some service provider, typically a telephone company telco. Managing Network Device Security 9. The New Edition of this Best-Selling Flash Cards and Exam Practice Pack is Completely Updated and includes Practice Questions, Flash Cards, and Reference Sheets for all Topics Covered in the New Exams.
In Ethernet, a segment is either a single Ethernet cable to a single collision domain no matter how many cables are used. Public network technology that delivers high bandwidth over conventional telco local-loop copper wiring at limited distances. Flash Cards More than 400 flash cards in print and online are available in customizable sets that you can tailor to your study needs. Accounting records information about access attempts, including inappropriate requests. Term multimode Definition A type of fiber-optic cabling with a larger core than single-mode cabling, allowing light to enter at multiple angles.
Term default mask Definition The mask used in a Class A, B, or C network that does not create any subnets; specifically, mask 255. Practically, a device tries to use the same speed as another device on the other end of a serial link. A general term referring to the variety of telephone networks and services in place worldwide. A type of nonvolatile memory that can be read but not written by the microprocessor. Step 4 - If a collision occurs, the devices that had been sending a frame each send a jamming signal to ensure that all stations recognize the collision.
Term What is step 5 when powering on a Cisco Router? Term E1 Definition Similar to a T1, but used in Europe. Note that this eBook version of the print book does not contain access to the Cert Flash Cards Online application nor to the Practice Test application that come with the print product. Distance vector routing algorithms call for each router to send its entire routing table in each update, but only to its neighbors. Managing Network Device Security 9. Term networking model Definition A generic term referring to any set of protocols and standards collected into a comprehensive grouping that, when followed by the devices in a network, allows all the devices to communicate. Link-state protocols build a detailed database that lists links subnets and their state up, down , from which the best routes can then be calculated.
Try each boot system command in the startup-config file, in order, until one works. The two devices set values in the header, send the header and encapsulated data, with the receiving device s interpreting the header to decide what action to take. Term telco Definition A common abbreviation for telephone company. Term same-layer interaction Definition The communication between two networking devices for the purposes of the functions defined at a particular layer of a networking model, with that communication happening by using a header defined by that layer of the model. 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. Each pair is used to send in one direction, so a four-wire circuit allows fullduplex communication. Term trace Definition Short for traceroute.
An interface in this state should be able to pass data-link frames. Primary rate access consists of a single 64-kbps D channel plus 23 T1 or 30 E1 B channels for voice or data. Used mainly to contrast these addresses with data-link addresses, which are generically considered to be physical addresses because they differ based on the type of physical medium. Term clock source Definition The device to which the other devices on the link adjust their speed when using synchronous links. Term subnetting Definition The process of subdividing a Class A, B, or C network into smaller groups called subnets.