Nginikeze isibonelo se-subnet esihlungiwe
Context:Ezokuphepha kwenethiwekhi inethiwekhi engaphansi kwesikrini ibhekisa ekusetshenzisweni komzila owodwa noma ngaphezulu wokuhlola njengodonga lomlilo ukuchaza amanethiwekhi amancane amathathu ahlukene: i-router yangaphandle (kwesinye isikhathi ebizwa ngokuthi i-router yokufinyelela), ehlukanisa inethiwekhi yangaphandle kunethiwekhi ye-perimeter, kanye ne-router yangaphakathi (kwesinye isikhathi ebizwa ngokuthi i-choke router) ehlukanisa inethiwekhi ye-perimeter kunethiwekhi yangaphakathi. Inethiwekhi ye-perimeter, ebizwa nangokuthi inethiwekhi yomngcele noma indawo engafakwanga amasosha (i-DMZ), yenzelwe ukusingatha amaseva (kwesinye isikhathi abizwa ngokuthi ama-bastion hosts) afinyeleleka noma anokufinyelela kuwo womabili amanethiwekhi angaphakathi nangaphandle. Inhloso yenethiwekhi esezingeni eliphezulu noma i-DMZ ukusungula inethiwekhi enokuphepha okuthuthukile ephakathi kwenethiwekhi yangaphandle necatshangelwa ukuthi iyingozi, efana ne-Internet noma i-extranet, nenethiwekhi yangaphakathi.  I-subnet ehlolwe ingumqondo obalulekile we-e-commerce noma noma iyiphi inhlangano enobukhona kwi-World Wide Web noma isebenzisa izinhlelo zokukhokha ngogesi noma ezinye izinsizakalo zenethiwekhi ngenxa yokwanda kwabaduni, izinsongo eziqhubekayo eziphambili, izibungu zamakhompyutha, ama-botnets, nezinye izinsongo ezinhlelweni zolwazi ezixhunyiwe.
Ezokuphepha kwenethiwekhi inethiwekhi engaphansi kwesikrini ibhekisa ekusetshenzisweni komzila owodwa noma ngaphezulu wokuhlola njengodonga lomlilo ukuchaza amanethiwekhi amancane amathathu ahlukene: i-router yangaphandle (kwesinye isikhathi ebizwa ngokuthi i-router yokufinyelela), ehlukanisa inethiwekhi yangaphandle kunethiwekhi ye-perimeter, kanye ne-router yangaphakathi (kwesinye isikhathi ebizwa ngokuthi i-choke router) ehlukanisa inethiwekhi ye-perimeter kunethiwekhi yangaphakathi. Inethiwekhi ye-perimeter, ebizwa nangokuthi inethiwekhi yomngcele noma indawo engafakwanga amasosha (i-DMZ), yenzelwe ukusingatha amaseva (kwesinye isikhathi abizwa ngokuthi ama-bastion hosts) afinyeleleka noma anokufinyelela kuwo womabili amanethiwekhi angaphakathi nangaphandle. Inhloso yenethiwekhi esezingeni eliphezulu noma i-DMZ ukusungula inethiwekhi enokuphepha okuthuthukile ephakathi kwenethiwekhi yangaphandle necatshangelwa ukuthi iyingozi, efana ne-Internet noma i-extranet, nenethiwekhi yangaphakathi.  I-subnet ehlolwe ingumqondo obalulekile we-e-commerce noma yinoma iyiphi inhlangano enobukhona kwi-World Wide Web noma isebenzisa izinhlelo zokukhokha ngogesi noma ezinye izinsizakalo zenethiwekhi ngenxa yokwanda kwabaduni, izinsongo eziqhubekayo eziphambili, izibungu zamakhompyutha, ama-botnets, nezinye izinsongo ezinhlelweni zolwazi ezinethiwekhi.