RESERVED IP ADDRESSES v Certain host addresses are

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RESERVED IP ADDRESSES v Certain host addresses are reserved and cannot be assigned to

RESERVED IP ADDRESSES v Certain host addresses are reserved and cannot be assigned to devices on a network. v An IP address that has binary 0 s in all host bit positions is reserved for the network address. v An IP address that has binary 1 s in all host bit positions is reserved for the broadcast address. Data Communications and Networks : : Mr. Parinya Noidonphrai (www. freebsd. sru. ac. th)

7 IP PRIVATE ADDRESSES No two machines that connect to a public network can

7 IP PRIVATE ADDRESSES No two machines that connect to a public network can have the same IP address because public IP addresses are global and standardized Private IP addresses are a solution to the problem of the exhaustion of public IP addresses. Addresses that fall within these ranges are not routed on the Internet backbone: Connecting a network using private addresses to the Internet requires the usage of NAT

ESTABLISHING THE SUBNET MASK ADDRESS To determine the number of bits to be used,

ESTABLISHING THE SUBNET MASK ADDRESS To determine the number of bits to be used, the network designer needs to calculate how many hosts the largest subnetwork requires and the number of subnetworks needed. 8

ตวอยางท 1 v กรณตวอยาง Network Address คอ 192. 168. 10. 0 v Subnet Mask

ตวอยางท 1 v กรณตวอยาง Network Address คอ 192. 168. 10. 0 v Subnet Mask คอ 255. 0 v จำนวน Segment ทตองการ คอ 6 Segment โดย Segment ละ 30 Host (จำนวนเครองคอมพวเตอร ) Data Communications and Networks : : Mr. Parinya Noidonphrai (www. freebsd. sru. ac. th)

ขนตอนท 2 คำนวณหา SUBNET ADDRESS v จาก Network Address คอ 192. 168. 10. 0

ขนตอนท 2 คำนวณหา SUBNET ADDRESS v จาก Network Address คอ 192. 168. 10. 0 แปลงเปนฐานสอง คอ v 11000000. 10101000. 000001010. 0 0 0 0 เรมจากบตทางดานขวาสด แทนคาบต 11000000. 10101000. 00001010. 0 0 1 0 0 0 = 192. 168. 10. 32 v 11000000. 10101000. 00001010. 0 1 0 0 0 = 192. 168. 10. 64 v 11000000. 10101000. 00001010. 0 1 1 0 0 0 = 192. 168. 10. 96 v 11000000. 10101000. 00001010. 1 0 0 0 0 = 192. 168. 10. 128 Data and Networks : : Mr. Parinya Noidonphrai v Communications 11000000. 10101000. 00001010. 1 0(www. freebsd. sru. ac. th) 1 0 0 0 = 192. 168. 10. 160 v

14 ขนตอนท 3 หา HOST RANGE Data Communications and Networks : : Mr. Parinya

14 ขนตอนท 3 หา HOST RANGE Data Communications and Networks : : Mr. Parinya Noidonphrai (www. freebsd. sru. ac. th)

Q/A Data Communications and Networks : : Mr. Parinya Noidonphrai (www. freebsd. sru. ac.

Q/A Data Communications and Networks : : Mr. Parinya Noidonphrai (www. freebsd. sru. ac. th)

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