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cours:bat4:netipws:ipudptcpsummary
Différences
Ci-dessous, les différences entre deux révisions de la page.
| Les deux révisions précédentes Révision précédente | |||
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cours:bat4:netipws:ipudptcpsummary [2018/03/07 17:13] tigli [Internet Communications and Protocol : Key Ideas] |
cours:bat4:netipws:ipudptcpsummary [2018/03/20 15:45] (Version actuelle) tigli [Internet Communications and Protocol : Key Ideas] |
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| * a network mask allows to specify the number of bits of the netid. All the bits corresponding to the netid are equal to 1 and the other to 0. Thus for 167.145.134.32/18 (the means 18 bits to code the netid), the mask is 255.255.192.0. | * a network mask allows to specify the number of bits of the netid. All the bits corresponding to the netid are equal to 1 and the other to 0. Thus for 167.145.134.32/18 (the means 18 bits to code the netid), the mask is 255.255.192.0. | ||
| * For each network, size of subnetid + size of hostid = 32 - size of netid. Be careful, <netid>|0..0 and <netid>|1..1 are use respectively to indentify the corresponding network and the broadcast adress (to send data to all the interfaces of the <netid> network at the same time). | * For each network, size of subnetid + size of hostid = 32 - size of netid. Be careful, <netid>|0..0 and <netid>|1..1 are use respectively to indentify the corresponding network and the broadcast adress (to send data to all the interfaces of the <netid> network at the same time). | ||
| - | * So, for each network coded on k bits, a maximum of 2^(32-k-1) adresses are available for hosts. | + | * So, for each network coded on k bits, a maximum of 2^(32-k) - 2 adresses are available for hosts. |
| === Exercices : === | === Exercices : === | ||
cours/bat4/netipws/ipudptcpsummary.1520439218.txt.gz · Dernière modification: 2018/03/07 17:13 par tigli
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