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A firewall is a part of the computer or network which
prevents unauthorized access to it.Firewalls are frequently
used to prevent unauthorized Internet users from accessing
private networks connected to the Internet.It regulates
traffic of the network of different trust levels.
On the other hand,Access Control List refers to rules that
are applied to port numbers or network daemon names that are
available on a host, each with a list of hosts and/or
networks permitted to use the service. Both individual
servers as well as routers can have network ACLs.
This way. ACL are the rules to be implemented for security
while firewall is he complete setup or mechanism.
Firewall provides a permission or destroys for a packet to
enter inside our network from private network .
Acl's which provide rules to control which type of packet
to be destroyed or permitted
Advantages:
1. More useful in connecting LAN with the Internet
2. Speed depends on the cost
Disadvantages:
1. Acts just as a interface between LAN and Internet
2. No traffic maintenance is present
Slow speed when compared to hub
Limited no of systems can be connected max-8 or 12
dhcp stand for dynamic host configuration protocol. it use
to reduse administrative task in the network by automatic
assine ip address. it when very usefull there computer are
frienkly moved.its a fether APIPA stand for automatic
private internet protocol address when dhcp is not avaiable
then the lan card automatically receve a ip rang is
169.254.0.0 is a apipa
Dynamic Host Configuration Protocol (DHCP) is a
client/server protocol that automatically provides an
Internet Protocol (IP) host with its IP address and other
related configuration information such as the subnet mask
and default gateway. RFCs 2131 and 2132 define DHCP as an
Internet Engineering Task Force (IETF) standard based on
Bootstrap Protocol (BOOTP), a protocol with which DHCP
shares many implementation details. DHCP allows hosts to
obtain necessary TCP/IP configuration information from a
DHCP server.
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