Transcript Handout_TCP_IP_Part2v2

TRANSPORT and NETWORK LAYERS - Part 2
Static and Dynamic Addressing
Address Resolution
Dr. V.T. Raja
Oregon State University
Static Addressing (Questions)

In each computer, which file typically
stores the IP address and subnet mask
addresses associated with that computer?


What ‘ command(s)’ will help determine the IP/DL
address of a computer running Windows OS?
What is static addressing?
 Is static addressing better for
clients/servers?
 Identify a disadvantage associated with
static addressing
Dynamic Addressing
(Questions)
A
solution to this problem is
dynamic addressing.
 What
 The
is dynamic addressing?
server that performs dynamic
addressing is called a _________
server.
Dynamic Addressing (Continued)
Are dynamically assigned addresses
temporary or permanent?
 How would you assign a client a
permanent IP using dynamic
addressing?
 Which option would an ISP likely use to
assign IP addresses to its subscribers’
computers?
 Does dynamic addressing simplify
network address management?

Dynamic Addressing

(Continued)
Dynamic addressing greatly simplifies
network address management:
IP address changes need to be done only to
DHCP server, not to each individual
computer’s configuration file.
 Next time a client (which has been moved to
another subnet) requests an IP address, the
new changed IP address will be
automatically assigned to the client by
DHCP server.

Address Resolution

Address resolution refers to the process
of:
Translating an application layer address (or
domain name) into a network layer address
 Translating network layer address into a
data link layer address.

Address Resolution

(Continued)
TCP/IP uses two different approaches,
one for resolving application layer
addresses into IP addresses and one for
resolving IP addresses into data link
layer addresses.
Address Resolution (Example)

Example: Request a web page from the
COB web server at University of Hawaii
 NL Address or Server name Resolution



Given AL address, determine IP address
Server name resolution is the translation of AL
addresses into NL addresses. How is this done?
Whenever an organization receives a set of
Internet addresses, it must inform ICANN of the
name and IP addresses of the name server(s) that
will provide DNS information (directory assistance)
for all addresses in that organization
Address Resolution (Example)

DL Address Resolution


Given NL address, determine NIC address. How is
this done?
Class Participation Exercise # 3