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Page 91 / 110 Scroll up to view Page 86 - 90
82
Appendix C: Downloading using Xmodem
Startup Menu Procedures
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
Caution: If you select <L> for loader code, be sure the file is a valid loader code file for the switch. If you
download an invalid file, the switch will not be able to boot. Unless absolutely necessary, do not attempt to
download loader code files. Press Send and the software is downloaded.
9.
Specify a name for the downloaded code file. File names are case-sensitive, should be from 1 to 31
characters, not contain slashes (\ or /), and the leading letter of the file name should not be a period (.). (Valid
characters: A-Z, a-z, 0-9, “.”, “-”, “_”)
10. To set the new downloaded file as the startup file, use the [S]et Startup File menu option.
11. Press <Q> to quit the firmware-download mode and boot the switch.
After quitting, the device will reboot automatically.
Figure C-4: Sending File
Figure C-3: Browse
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83
Appendix D: Glossary
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
Appendix D: Glossary
This glossary contains some basic networking terms you may come across when using this product. For more
advanced terms, see the complete Linksys glossary at http://www.linksys.com/glossary.
Access Mode
- Specifies the method by which user access is granted to the system.
Access Point
- A device that allows wireless-equipped computers and other devices to communicate with a
wired network. Also used to expand the range of a wireless network.
Access Profiles
- Allows network managers to define profiles and rules for accessing the device. Access to
management functions can be limited to user groups, which are defined by the following criteria:
•
Ingress interfaces.
•
Source IP address and/or Source IP subnets.
ACE
- Filters in Access Control Lists (ACL) that determine which network traffic is forwarded. An ACE is based on
the following criteria:
•
Protocol
•
Protocol ID
•
Source Port
•
Destination Port
•
Wildcard Mask
•
Source IP Address
•
Destination IP Address
ACL (A
ccess
C
ontrol
L
ist
)
-
Access Control Lists are used to grant, deny, or limit access devices, features, or
applications.
Auto-negotiation
- Allows 10/100 Mbps or 10/100/1000 Mbps Ethernet ports to automatically establish the
optimal duplex mode, flow control, and speed.
Back Pressure
- A mechanism used with Half Duplex mode that enables a port not to receive a message.
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84
Appendix D: Glossary
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
Bandwidth
- The transmission capacity of a given device or network.
Bandwidth Assignments
- Indicates the amount of bandwidth assigned to a specific application, user, and/or
interface.
Baud
- Indicates the number of signaling elements transmitted each second.
Best Effort
- Indicates that traffic is assigned to the lowest priority queue, and packet delivery is not guaranteed.
Bit
- A binary digit.
Boot
- To start a device and cause it to start executing instructions.
Browser
- An application program that provides a way to look at and interact with all the information on the
World Wide Web.
Bridge
- A device that connect two networks. Bridges are hardware specific, however they are protocol
independent. Bridges operate at Layer 1 and Layer 2 levels.
Broadcast Domain
- Devices sets that receive broadcast frames originating from any device within a designated
set. Routers bind Broadcast domains, because routers do not forward broadcast frames.
Broadcast Storm
- An excessive amount of broadcast messages simultaneously transmitted across a network
by a single port. Forwarded message responses are heaped onto the network, overloading network resources or
causing the network to time out.
Burst
- A packet transmission at faster than normal rates. Bursts are limited in time and only occur under
specific conditions.
Burst Size
- Indicates the burst size transmitted at a faster than normal rate.
Byte
- A unit of data that is usually eight bits long
Cable Modem
- A device that connects a computer to the cable television network, which in turn connects to the
Internet.
CBS
(
C
ommitted
B
urst
S
ize) - Indicates the maximum number of data bits transmitted within a specific time
interval.
CIR
(
C
ommitted
I
nformation
R
ate) - The data rate is averaged over a minimum time increment.
Class Maps
- An aspect of Quality of Service system that is comprised of an IP ACL and/or a MAC ACL. Class
maps are configured to match packet criteria, and are matched to packets in a first-fit fashion.
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85
Appendix D: Glossary
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
Combo Ports
- A single logical port with two physical connections, including an RJ-45 connection and a SFP
connection.
Communities
- Specifies a group of users which retain the same system access rights.
CoS
(
C
lass
o
f
S
ervice) - 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
(
D
ynamic
D
omain
N
ame
S
ystem) - 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
(
D
ynamic
H
ost
C
onfiguration
P
rotocol) - 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
(
D
omain
N
ame
S
erver) - 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
(
D
igital
S
ubscriber
L
ine) - An always-on broadband connection over traditional phone lines.
DSCP
(
D
iff
S
erve
C
ode
P
oint) provides a method of tagging IP packets with QoS priority information.
Dynamic IP Address
- A temporary IP address assigned by a DHCP server.
EIGRP
(
E
nhanced
I
nterior
G
ateway
R
outing
P
rotocol) - 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.
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86
Appendix D: Glossary
24-Port 10/100/1000 Gigabit Switch with Webview and PoE
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
(
F
ile
T
ransfer
P
rotocol) - 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
(
G
eneral
A
ttributes
R
egistration
P
rotocol) - Registers client stations into a multicast domain.
Gateway
- A device that interconnects networks with different, incompatible communications protocols.
GBIC
(
G
iga
B
it
I
nterface
C
onverter) - 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
(
G
ARP
V
LAN
R
egistration
P
rotocol) - 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
(
H
yper
T
ext
T
ransport
P
rotocol) - The communications protocol used to connect to servers on the World
Wide Web.
HTTPS
(
H
yper
T
ext
T
ransport
P
rotocol
S
ecure) - 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
(I
nternet
C
ontrol
M
essage
P
rotocol) - Allows the gateway or destination host to communicate with the
source host. For example, to report a processing error.
IGMP
(
I
nternet
G
roup
M
anagement
P
rotocol) - Allows hosts to notify their local switch or router that they want to
receive transmissions assigned to a specific multicast group.
IP
(
I
nternet
P
rotocol) - 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
(
I
nternet
P
rotocol
Sec
urity) - A VPN protocol used to implement secure exchange of packets at the IP layer.
ISP
(
I
nternet
S
ervice
P
rovider) - 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
(
L
ink
A
ggregated
G
roup) - Aggregates ports or VLANs into a single virtual port or VLAN.
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