SonicWALL Internet Security Appliances Benutzerhandbuch
Page 264 SonicWALL Internet Security Appliance Administrator’s Guide
Network Protocols
The method that used to regulate a workstation’s access to a computer network to prevent data
collisions. The SonicWALL uses the TCP/IP protocol.
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collisions. The SonicWALL uses the TCP/IP protocol.
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TCP/IP - Internet Protocol, or "IP", provides connectionless data transfer over a TCP/IP network.
Since IP alone does not provide end-to-end data reliability as well as some other services, other
protocols such as TCP (Transmission Control Protocol) can be added to provide these services.
In TCP/IP, TCP works with IP to ensure the integrity of the data traveling over the network. TCP/
IP is the protocol of the Internet.
Since IP alone does not provide end-to-end data reliability as well as some other services, other
protocols such as TCP (Transmission Control Protocol) can be added to provide these services.
In TCP/IP, TCP works with IP to ensure the integrity of the data traveling over the network. TCP/
IP is the protocol of the Internet.
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FTP - File Transfer Protocol (FTP) is used to transfer documents between different types of com-
puters on a TCP/IP network.
puters on a TCP/IP network.
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HTTP - HyperText Transfer Protocol (HTTP) is a widely used protocol to transfer information over
the Internet. Typically, it is used to transfer information from Web servers to Web browsers.
the Internet. Typically, it is used to transfer information from Web servers to Web browsers.
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UDP - User Datagram Protocol (UDP) transfers information using virtual ports between two ap-
plications on a TCP/IP network. Slightly faster than TCP, it is not as reliable.
plications on a TCP/IP network. Slightly faster than TCP, it is not as reliable.
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DNS - Domain Name System (DNS) is a protocol that matches Internet computer names to their
corresponding IP addresses. By using DNS, a user can type in a computer name, such as
www.sonicwall.com, instead of an IP address, such as 192.168.168.168, to access a
computer.
corresponding IP addresses. By using DNS, a user can type in a computer name, such as
www.sonicwall.com, instead of an IP address, such as 192.168.168.168, to access a
computer.
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DHCP - Dynamic Host Configuration Protocol (DHCP) allows communication between network
devices and a server that administers IP numbers. A DHCP server leases IP addresses and other
TCP/IP information to DHCP client that requests them. Typically, a DHCP client leases an IP
address for a period of time from a DHCP server which allows a larger number of clients to use
a set pool of IP addresses.
devices and a server that administers IP numbers. A DHCP server leases IP addresses and other
TCP/IP information to DHCP client that requests them. Typically, a DHCP client leases an IP
address for a period of time from a DHCP server which allows a larger number of clients to use
a set pool of IP addresses.
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WINS - Windows Internet Naming System (WINS), used on Microsoft
®
TCP/IP Networks, matches
Microsoft
®
network computer names to IP addresses. Using this protocol allows computers on
the Microsoft
®
network to communicate with other networks and computers that use the TCP/
IP suite.
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HTTPS - Secure HyperText Transfer Protocol (HTTPS) is a protocol to transfer information
securely over the Internet. HTTPS encrypts and decrypts information exchanged between a Web
server and a Web browser using Secure Socket Layer (SSL).
securely over the Internet. HTTPS encrypts and decrypts information exchanged between a Web
server and a Web browser using Secure Socket Layer (SSL).
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SMTP - Simple Mail Transfer Protocol (SMTP) is used to send and receive e-mail messages.
Typically, SMTP is used only to send e-mail while another protocol, POP3, is used to receive e-
mail messages.
Typically, SMTP is used only to send e-mail while another protocol, POP3, is used to receive e-
mail messages.
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POP3 - Post Office Protocol 3 (POP3) is used to receive e-mail messages and storing messages
on a server, referred to as a POP server.
on a server, referred to as a POP server.
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ICMP - Internet Control Messages Protocol (ICMP) reports errors and controls messages on a
TCP/IP network. PING uses ICMP protocol to test if a network device is available.
TCP/IP network. PING uses ICMP protocol to test if a network device is available.