互聯(lián)網(wǎng)協(xié)議英文-wenkub
2023-03-09 09:46:09 本頁(yè)面
【正文】 ts ? Define a Unique Sub ID for Each Physical Segment Based on the Sub Mask ? Define Valid Host IDs for Each Sub Based on the Sub ID Sub Masks ? A 32bit value posed of 1s and 0s. The 1s in the sub mask represent the positions that refer to the work or sub addresses. ? Distinguishes the Network ID from the Host ID ? Used to Specify Whether the Destination Host is Local or Remote ? If ANDed results of source and destination hosts match, the destination is local Default Sub Masks Bits Used for Sub Mask Address Class Dotted Decimal Notation Class A Class B Class C 11111111 00000000 00000000 00000000 11111111 11111111 00000000 00000000 11111111 11111111 11111111 00000000 . . . . IP Address Sub Mask Network ID Host ID Possible Sub Masks for Class A, B C Class C Class B Class A Defining a Sub Mask Convert the Number of Segments to Binary Count the Number of Required Bits Convert the Required Number of Bits to Decimal (High Order) 1 2 3 Example of Class B Address Number of Subs Binary Value Convert to Decimal 6 0 0 0 0 0 1 1 0 = 6 (3 Bits) 4+2 255 . 255 . 224 . 0 11111111 11111111 11100000 00000000 Sub Mask Defining Sub IDs 255 255 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 00000000 = 0 00100000 = 32 01000000 = 64 01100000 = 96 10000000 = 128 10100000 = 160 11000000 = 192 11100000 = 224 1 2 3 224 Sub Mask Defining Host IDs Sub IDs Host ID Range Invalid – – – – – – Invalid 00000000 = 0 00100000 = 32 01000000 = 64 01100000 = 96 10000000 = 128 10100000 = 160 11000000 = 192 11100000 = 224 ? Each Sub ID Indicates the Beginning Value in a Range ? The Ending Value Is One Less Than the Beginning Value of the Next Sub ID Example Sub Ids Sub Mask Network ID Host Range 00000000 = 0 00100000 = 32 01000000 = 64 01100000 = 96 10000000 = 128 10100000 = 160 11000000 = 192 11100000 = 224 TOTAL 6 SUBNETS 8190 HOSTS PER SUBNET Netword ID FROM ISP No. of Network = 1 SUBNET MASK No. of Hosts = 65534 (2^162) We need 6 Subs 255 255 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 224 演講完畢，謝謝觀看！ 。 Inter Protocol Overview TCP/IP and the DoD Model IP Addressing Subting TCP/IP and the DoD Model Comparison of Dod and OSI Model The TCP/IP protocol suite The Process / Application layer Protocols The HosttoHost Layer Protocols The Inter Lay
物理相關(guān)推薦
鄂ICP備17016276號(hào)-1