Cisco Systems SLM224G4PS, SLM248G4PS manual Glossary

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Appendix C

Glossary

CoS (Class of Service)  The 802.1p priority scheme. CoS provides a method for tagging packets with priority information. A CoS value between 0-7 is added to the Layer II header of packets, where zero is the lowest priority and seven is the highest.

DDNS (Dynamic Domain Name System)  Allows the hosting of a website, FTP server, or e-mail server with a fixed domain name (e.g., www.xyz.com) and a dynamic IP address.

Default Gateway  A device that forwards Internet traffic from your local area network.

DHCP (Dynamic Host Configuration Protocol)  A networking protocol that allows administrators to assign temporary IP addresses to network computers by“leasing” an IP address to a user for a limited amount of time, instead of assigning permanent IP addresses.

DHCP Clients  An Internet host using DHCP to obtain configuration parameters, such as a network address.

DHCP Server  An Internet host that returns configuration parameters to DHCP clients.

DNS (Domain Name Server)  The IP address of your ISP’s server, which translates the names of websites into IP addresses.

Domain  A specific name for a network of computers. Download  To receive a file transmitted over a network.

DSL (Digital Subscriber Line)  An always-on broadband connection over traditional phone lines.

DSCP (DiffServ Code Point)  Provides a method of tagging IP packets with QoS priority information.

Dynamic IP Address  A temporary IP address assigned by a DHCP server.

EIGRP (Enhanced Interior Gateway Routing Protocol)  Provides fast convergence, support for variable- length subnet mask, and supports multiple network layer protocols.

Encryption  Encoding data transmitted in a network.

Ethernet  IEEE standard network protocol that specifies how data is placed on and retrieved from a common transmission medium.

Firmware  The programming code that runs a networking device.

Flow Control  Enables lower speed devices to communicate with higher speed devices. This is implemented by the higher speed device refraining from sending packets.

FTP (File Transfer Protocol)  A protocol used to transfer files over a TCP/IP network.

Full Duplex  The ability of a networking device to receive and transmit data simultaneously.

GARP (General Attributes Registration Protocol)  Registers client stations into a multicast domain.

Gateway  A device that interconnects networks with different, incompatible communications protocols.

GBIC (GigaBit Interface Converter)  A hardware module used to attach network devices to fiber-based transmission systems. GBIC converts the serial electrical signals to serial optical signals and vice versa.

GVRP (GARP VLAN Registration Protocol)  Registers client stations into a VLANs.

Half Duplex  Data transmission that can occur in two directions over a single line, but only one direction at a time.

HTTP (HyperText Transport Protocol)  The

communications protocol used to connect to servers on the World Wide Web.

HTTPS (HyperText Transport Protocol Secure)  An extension to the standard HTTP protocol that provides confidentiality by encrypting the traffic from the website. By default this protocol uses TCP port 443.

ICMP (Internet Control Message Protocol)  Allows the gateway or destination host to communicate with the source host. For example, to report a processing error.

IGMP (Internet Group Management Protocol)  Allows hosts to notify their local switch or router that they want to receive transmissions assigned to a specific multicast group.

IP (Internet Protocol)  A protocol used to send data over a network.

IP Address  The address used to identify a computer or device on a network.

IPCONFIG  A Windows 2000 and XP utility that displays the IP address for a particular networking device.

IPSec (Internet Protocol Security)  A VPN protocol used to implement secure exchange of packets at the IP layer.

ISP (Internet Service Provider)  A company that provides access to the Internet.

Jumbo Frames  Enable transporting identical data in fewer frames. Jumbo Frames reduce overhead, lower processing time, and ensure fewer interrupts.

LAG (Link Aggregated Group)  Aggregates ports or VLANs into a single virtual port or VLAN.

LAN  The computers and networking products that make up your local network.

24/48-Port 10/100 + 4-Port Gigabit Smart Switch with Resilient Clustering Technology and PoE

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Contents Port or 48-Port 10/100 + Icon Descriptions About This GuideAbout This Guide Online ResourcesTable of Contents Snmp Snmp Global Parameters Snmp Views Snmp Group ProfileAppendix B About Switch Stacking Gigabit Ethernet Fiber Optic CablingAppendix C Glossary Appendix D Specifications Appendix G Contact InformationChapter IntroductionProduct Overview Switch LEDs and ports are located on the front panelChapter Product Overview Front PanelPower The Power port is where you connect the AC power Switch’s LEDs and ports are located on the front panelBack Panel Product Overview Pre-Installation Considerations Chapter InstallationInstallation Placement OptionsHardware Installation Desktop PlacementRack-Mount Placement Uplinking the Switch Configuring Stack ModeTo set up a stack with six switches, follow these steps Power off the new unit 5 the former master unit Connect port G1 on Unit 2 to port G2 on UnitConnect port G1 on Unit 3 to port G2 on Unit Chapter Configuration Using Console Interface Using telnetLogin screen appears. Proceed to the Login section below Switch Main Menu How to Use the Console InterfaceLogin System Configuration MenuManagement Settings System InformationUser & Password Settings Security SettingsIP Configuration Http Stack Configuration Restore System Default SettingsReboot System File ManagementPort Configuration Port Status MenuHelp System ModePoE Settings LogoutSetup Summary Chapter Configuration Using Web-based UtilitySetup Device InformationOrange The administrator has closed down this port Setup ZoomSetup Network Settings Clicking on a port displays the Port Configuration screenLocal Time Setup TimeSet Time Daylight SavingPort Management Setup Stack ManagementPort Management Port Settings Sntp ServersPort Management Port Settings Port Configuration LAG Configuration Port Management Link AggregationPort Management PoE Power Settings Port Management LacpVlan Management Create Vlan Vlan Management Port SettingVlan Management Vlan TableVlan Management Port to Vlan Vlan Management Vlan to PortJoin Vlan to Port Statistics Statistics Rmon StatisticsStatistics Rmon History Rmon History Log TableRmon History Table Statistics Rmon Alarms Add AlarmAlarm Table Statistics Rmon Events Statistics Port UtilizationStatistics Interface Statistics Ethernet-like Security 802.1x SettingsSecurity ParametersSetting Timer Security Port SecuritySecurity Management Access List Security Storm ControlQoS Security RadiusBroadcast Only Counts only Broadcast traffic CoS Settings QoS CoS SettingsQoS Queue Settings CoS DefaultQoS Dscp Settings QoS Basic ModeQoS Bandwidth Spanning Tree STP Status Global SettingSpanning Tree Spanning Tree Global STPSpanning Tree STP Port Settings Bridge SettingsSpeed Displays the speed at which the port is operating Multicast Igmp Snooping Vlan Igmp SettingsMulticast Multicast Bridge MulticastMulticast Bridge Multicast Forward All Snmp Global ParametersSnmp Views Snmp Group ProfileSnmp Group Membership Snmp CommunitiesUser Name Provides a user-defined local user list Base Table Snmp Notification FilterSnmp Notification Recipient Advanced TableUser Authentication AdminAdmin User Authentication Local User EditAdmin Static Address Admin Dynamic AddressSecure The entry is defined for locked ports Query Admin Port MirroringAdmin Cable Test Clear Table If selected, this clears the MAC Address tableAdmin Save Configuration Admin Firmware Upgrade Admin RebootAdmin Factory Default Admin Logging Admin Server LogsAdmin Memory Logs Admin Flash Logs LogoutGigabit Ethernet Appendix aAppendix a About Gigabit Ethernet Fiber Optic Cabling Fiber Optic CablingAppendix B Appendix B About Switch StackingAbout Switch Stacking Stack Building Quick StartUnit IDs Advanced StackingStack Resiliency Unit ID AllocationStack Units Startup Process Master DiscoveryMaster Election Stacking Examples Unit and Port ConfigurationUser Controls Replacing a Failed Stack Member in a Running StackStack Master Failure and Replacement Subgroup Contains Both Master Unit and Backup Master Unit Splitting a StackMerging Two Stacks Both Stacks Kept Running During InsertionStacking Cable Failure Inserting Too Many UnitsAppendix C Appendix C GlossaryGlossary Glossary Packet a unit of data sent over a network Mail protocol on the InternetAppendix C Appendix D Specifications SpecificationsAppendix D Dimensions Class of Service Port-based 802.1p Vlan priority-basedPower in compliance with Ieee Management VlanAppendix E Warranty InformationObtaining Warranty Service Exclusions and LimitationsWarranty Information Technical SupportAppendix F Regulatory InformationRegulatory Information Appendix F Norsk Norwegian Miljøinformasjon for kunder i EU Appendix F Appendix G Contact Information
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