D-Link DFL-1000 Инструкция по эксплуатации онлайн [157/168] 42180

D-Link DFL-1000 Инструкция по эксплуатации онлайн [157/168] 42180
DFL-1000 User Manual
15
7
MTU , Maximum Transmission Unit : The largest physical packet size, measured in bytes, that a
network can transmit. Any packets larger than the MTU are divided into smaller packets before being sent.
Ideally, you want the MTU your network produces to be the same as the smallest MTU of all the networks
between your machine and a message's final destination. If your messages are larger than one of the
intervening MTUs, they get broken up (fragmented), which slows down transmission speeds.
Netmask : Also called subnet mask. A set of rules for omitting parts of a complete IP address to reach a
target destination without using a broadcast message. It can indicate a subnetwork portion of a larger
network in TCP/IP. Sometimes referred to as an Address Mask.
NTP , Network Time Protocol : Used to synchronize the time of a computer to an NTP server. NTP
provides accuracies to within tens of milliseconds across the Internet relative to Coordinated Universal
Time (UTC).
Packet : A piece of a message transmitted over a packet-switching network. One of the key features of a
packet is that it contains the destination address in addition to the data. In IP networks, packets are often
called datagrams.
Ping, Packet Internet Grouper : A utility used to determine whether a specific IP address is accessible.
It works by sending a packet to the specified address and waiting for a reply.
POP3, Post Office Protocol : A protocol used to transfer e-mail from a mail server to a mail client across
the Internet. Most e-mail clients use POP.
PPP, Point-to-Point Protocol : A TCP/IP protocol that provides host-to-network and router-to-router
connections.
PPTP, Point-to-Point Tunneling Protocol : A Windows-based technology for creating VPNs. PPTP is
supported by Windows 98, 2000, and XP. To create a PPTP VPN, your ISP's routers must support PPTP.
Port : In TCP/IP and UDP networks, a port is an endpoint to a logical connection. The port number
identifies what type of port it is. For example, port 80 is used for HTTP traffic.
Protocol : An agreed-upon format for transmitting data between two devices. The protocol determines
the type of error checking to be used, the data compression method (if any), how the sending device
indicates that it has finished sending a message, and how the receiving device indicates that it has
received a message.
RADIUS , Remote Authentication Dial-In User Service : An authentication and accounting system used
by many Internet Service Providers (ISPs). When users dial into an ISP they enter a user name and
password. This information is passed to a RADIUS server, which checks that the information is correct,
and then authorizes access to the ISP system.
Router : A device that connects LANs into an internal network and routes traffic between them.
Routing
: The process of determining a path to use to send data to its destination.
Routing table : A list of valid paths through which data can be transmitted.
Server : An application that answers requests from other devices (clients). Used as a generic term for
any device that provides services to the rest of the network such as printing, high capacity storage, and
network access.
SMTP, Simple Mail Transfer Protocol : In TCP/IP networks, this is an application for providing mail
delivery services.
SNMP , Simple Network Management Protocol : A set of protocols for managing networks. SNMP
works by sending messages to different parts of a network. SNMP-compliant devices, called agents, store
data about themselves in Management Information Bases (MIBs) and return this data to the SNMP
requesters.
SSH , Secure shell : A secure Telnet replacement that you can use to log into another computer over a
network and run commands. SSH provides strong secure authentication and secure communications
over insecure channels.
Subnet
: A portion of a network that shares a common address component. On TCP/IP networks,
subnets are defined as all devices whose IP addresses have the same prefix. For example, all devices
with IP addresses that start with 100.100.100. would be part of the same subnet. Dividing a network into

Содержание

Скачать