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Address translaion 12
Address translaion 12
CONTENTS
 DEFINITION
 PROCESS
 TYPES
 ADVANTAGE
 DISADVANTAGE
DEFINITION
PROCESS OF ADDRESS
TRANSLATION
 The address translation process can be
  described as follows ---
1-Break the logical address down into page
  number and offset.
2-Use the page number as an index into a
  page table to find the corresponding page
  frame.
3-Using the frame number found there
  generate a physical address by
  concatenating the frame number and offset
  from the original address.
Translation tables are implemented in HW,
controlled by SW.




                    Translation table
        Virtual                            Physical
       addresses                          addresses

                   Data reads or writes
                     (untranslated)
Types of address translation
   Address translation comes in a variety of
    types which are given below-

    1- NAT (network address translation)
     2-PAT (Port address translation)
     3- Dynamic address translation
     4- Static address translation
NETWORK ADDRESS TRANSLATION
. Network  Address Translation (NAT) is a method of connecting
multiple computers to the Internet (or any other IP network)
using one IP address. This allows home users and small
businesses to connect their network to the Internet cheaply
and efficiently.
Static Address Translations

Static address translation establishes a one-to-
one mapping between a local and global address
or local and global address/port pair. When
specifying a static address translation or
address/port pair translation, you issue
commands to indicate how the translation is
applied, along with more specific variables that
further define the type of translation
DYNAMIC ADDRESS
   TRANSLATION
Dynamic address translation, or DAT is the
process of translating a virtual address
during a storage reference into the
corresponding real address.
PORT ADDRESS TRANSLATION
With Port Address Translation (PAT), also known as
overload and [[Network Address Port Translation (NAPT),
the customer may map several internal addresses to one
public address. When using PAT, traffic attempts to engage
the original source port. If the source port is fully utilized,
PAT causes the traffic to find the first available port.
ADVANTAGE OF ADDRESS
TRANSLATION -

The advantage of address translation include-

1.Conservation of public addresses.

2.Protection of resources with private addresses
from external devices.

3.No need for readdressing of devices when
switching from one ISP to another.
DISADVANTAGES OF ADDESS
TRASLATION
1.Each connection has an added delay.

2.Troubleshooting is more difficult.

3.Not all applications work with address translation.
Address translaion 12
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Address translaion 12

  • 3. CONTENTS DEFINITION PROCESS TYPES ADVANTAGE DISADVANTAGE
  • 5. PROCESS OF ADDRESS TRANSLATION The address translation process can be described as follows --- 1-Break the logical address down into page number and offset. 2-Use the page number as an index into a page table to find the corresponding page frame. 3-Using the frame number found there generate a physical address by concatenating the frame number and offset from the original address.
  • 6. Translation tables are implemented in HW, controlled by SW. Translation table Virtual Physical addresses addresses Data reads or writes (untranslated)
  • 7. Types of address translation Address translation comes in a variety of types which are given below- 1- NAT (network address translation) 2-PAT (Port address translation) 3- Dynamic address translation 4- Static address translation
  • 8. NETWORK ADDRESS TRANSLATION . Network Address Translation (NAT) is a method of connecting multiple computers to the Internet (or any other IP network) using one IP address. This allows home users and small businesses to connect their network to the Internet cheaply and efficiently.
  • 9. Static Address Translations Static address translation establishes a one-to- one mapping between a local and global address or local and global address/port pair. When specifying a static address translation or address/port pair translation, you issue commands to indicate how the translation is applied, along with more specific variables that further define the type of translation
  • 10. DYNAMIC ADDRESS TRANSLATION Dynamic address translation, or DAT is the process of translating a virtual address during a storage reference into the corresponding real address.
  • 11. PORT ADDRESS TRANSLATION With Port Address Translation (PAT), also known as overload and [[Network Address Port Translation (NAPT), the customer may map several internal addresses to one public address. When using PAT, traffic attempts to engage the original source port. If the source port is fully utilized, PAT causes the traffic to find the first available port.
  • 12. ADVANTAGE OF ADDRESS TRANSLATION - The advantage of address translation include- 1.Conservation of public addresses. 2.Protection of resources with private addresses from external devices. 3.No need for readdressing of devices when switching from one ISP to another.
  • 13. DISADVANTAGES OF ADDESS TRASLATION 1.Each connection has an added delay. 2.Troubleshooting is more difficult. 3.Not all applications work with address translation.