Matrix SETU VFX44L, System Manual

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VFX44L V1
System Manual
network. Such decisions are made on the basis of routing-tables
contained within the various routers, with each table comprising an
IP address table.
• Subnet is a portion of the network, which may be a physically
independent network, which shares a network address with other
portions of the network and is distinguished by a subnet number.
• The first octet of the IP address shows the network address, the
second one shows the subnet number and the last two shows the
host part.
Default gateway
• A default gateway is a node on a computer network that serves as
an access point to another network.
• In enterprises, the gateway is the computer that routes the traffic
from a workstation to the outside network that is serving the Web
pages.
• In homes, the gateway is the ISP that connects the user to the
internet.
• A default gateway is used by a host when an IP packet’s
destination address belongs to someplace outside the local subnet
(thus requiring more than one host of Ethernet communication).
• The default gateway address is usually an interface belonging to
the LAN’s border router.
Domain Name System (DNS)
•
DNS is a system that stores information about
host names
and
domain names
in a type of distributed database on networks, such
as the Internet.
• Of the many types of information that can be stored, most
importantly it provides a physical location (IP address) for each
domain name, and lists the mail exchange servers accepting e-mail
for each domain.
• The DNS provides a vital service on the Internet as it allows the
transmission of technical information in a user friendly way.
• While computers and network hardware work with IP addresses to
perform tasks such as addressing and routing, humans generally
find it easier to work with hostnames and domain names (such as
www.example.com) in URLs and e-mail addresses.