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NETW206 Ch 02
Basic Switch Concepts & Configuration
| Question | Answer |
|---|---|
| Auto-MDIX | The switch will detect the required cable type for copper Ethernet connections and configures the interface pin-outs accordingly, enabling the use of either crossover cables or straight-through cables, for connections to a 10/100/1000 port on a switch. |
| Cisco Discovery Protocol (CDP) | Media & protocol independent device-discovery protocol that runs on all Cisco-manufactured equipment. A device can advertise its existence to other devices and receive information about other devices on the same LAN or on the remote side of a WAN. |
| Cut-through Switching | Eth frame switching that streams data so that the leading edge of a pkt exits the switch at the egress prt before the pkt finished entering the ingress prt. Switch reads/procs/forwards the pkts as soon as the dest address is read & egress port determined. |
| Encryption | The application of a specific algorithm to data so as to alter the appearance of the data, making it incomprehensible to those who are not authorized to see the information. |
| Flooding | A data-trafficking technique used by switches in which traffic received on an interface is sent out all the other interfaces of the switch. |
| Full Duplex | The capability of a port for simultaneous data transmission and reception. |
| Graphical User Interface (GUI) | Environment that uses pictoral as well as textual representations of the input and output of applications and the data structure in which information is stored. |
| Half Duplex | Refers to the transmission of data in just one direction at a time. At any given instant, the device can transmit or receive, but not both at the same time. |
| Non-Volatile RAM (NVRAM) | RAM that retains its contents when a device is powered off. In Cisco products, NVRAM is used to store configuration information. |
| Organized Unique Identifier (OUI) | 3-byte hexadecimal number that the IEEE Registration Authority assigns to any company that manufactures ISO/IEC 8802 components. Its used to generate universal MAC addresses and proto identifiers for use in local and metro area network apps. Cisco OUI |
| Propagation Delay | The time lag between the departure of a signal from the source and the arrival of the signal at the destination. |
| Read-Only Memory (ROM) | Non-volatile memory that can be read, but not written to, by the microprocessor. |
| Simple Network Management Protocol (SNMP) | Used to monitor and control network devices, and to manage configurations, statistics collection, performance, and security. |
| Spoofing | The act of a packet or frame being represented with a false source address to mask its true source. Spoofing is designed to foil network security mechanisms such as filters and access lsts. |
| Store-and-Forward | Frames are completely processed before being forwarded out the appropriate port. This processing includes calculating the CRC and checking the destination address. Frames must be temp stored until network resources are available to fwd the msg. |
| Trivial File Transfer Protocol (TFTP) | A simplified version of the FTP that allows files to be transferred from one computer to another over a network in clear text without authentication. |
| Virtual LAN (VLAN) | Hosts with a common set of requirements that communicate as if they were attached to the same wire, regardless of their physical location. Has the same attributes as a phys LAN, but allows for hosts to be grouped as if located on the same LAN segment. |
| How does the Ethernet switch process the incoming traffic using port-based memory buffering? | The frames are stored in queues that are linked to specific incoming ports. |
| What are two key features of an Ethernet switch with Layer 2 capabilities? List two | Full-duplex operation & Filtering based on MAC address. |
| The network administrator wants to configure an IP address on a Cisco switch. How does the network administrator assign the IP address? | On the management VLAN |
| Why should a default gateway be assigned to a switch? | So that other networks can be accessed from the command prompt of the switch. |
| Which two tasks does autonegotiation in an Ethernet network accomplish? List two | Sets the link speed & Sets the link duplex mode. |
| Which term describes the time delay between a frame being sent from a source device and received on a destination device? | Latency |
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