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Bu eksenler nedir?",[153,156,159,162],{"key":154,"text":155},"a","Port ataması ve sağlama toplamı doğrulaması",{"key":157,"text":158},"b","Adres\u002Fport eşlemesi ve filtreleme",{"key":160,"text":161},"c","Parçalama ve yeniden birleştirme",{"key":163,"text":164},"d","Şifreleme ve kimlik doğrulama","RFC 4787 §4'te adres\u002Fport eşleme davranışını, §5'te filtreleme davranışını NAT'ın iki bağımsız özelliği olarak tanımlar; bir NAT'ın eşleme seçimi filtreleme seçimini belirlemez.",{"id":167,"topic":9,"difficulty":168,"body":169,"options":170,"correct_key":160,"explanation":179},"01a039c8-9f1b-70aa-882e-3d56a07ef379",2,"Bir NAT 'Endpoint-Independent Mapping' (uç-bağımsız eşleme) davranışına sahip. Bu, dahili bir istemcinin iki farklı dış hedefe paket göndermesi için ne anlama gelir?",[171,173,175,177],{"key":154,"text":172},"Her hedef için eşleme tek paketten sonra sona erer",{"key":157,"text":174},"Dahili istemciye her hedef için yeni bir dahili port atanır",{"key":160,"text":176},"Aynı dış eşleme her iki hedef için de yeniden kullanılır",{"key":163,"text":178},"Sadece ilk hedef geçerli bir dış eşleme alır","RFC 4787, Endpoint-Independent Mapping'i, aynı dahili IP:port'tan gönderilen paketler için hangi dış hedefe gidilirse gidilsin aynı dış IP:port eşlemesinin yeniden kullanılması olarak tanımlar.",{"id":181,"topic":9,"difficulty":168,"body":182,"options":183,"correct_key":154,"explanation":192},"01a039c8-9f1b-79b7-809e-888fd770e834","'Address and Port-Dependent Mapping' altında, NAT zaten eşlenmiş bir dahili soket için ne zaman tamamen yeni bir dış eşleme oluşturur?",[184,186,188,190],{"key":154,"text":185},"Paket yeni bir dış IP adresine veya porta gönderildiğinde",{"key":157,"text":187},"Sadece dahili uygulama yeniden başladığında",{"key":160,"text":189},"Sadece eşlemenin zamanlayıcısı, hedeften bağımsız olarak dolduğunda",{"key":163,"text":191},"Hiçbir zaman; bir dahili soket her zaman tek bir eşlemeyi korur","RFC 4787, Address and Port-Dependent Mapping altında X1':x1' değerinin X2':x2' değerine ancak Y2:y2, Y1:y1'e eşitse eşit olduğunu belirtir — hedef IP veya port değişimi farklı bir dış eşleme üretir.",{"id":194,"topic":9,"difficulty":168,"body":195,"options":196,"correct_key":163,"explanation":205},"01a039c8-9f1c-74f9-812d-142612c3b396","Bir NAT 'Endpoint-Independent Filtering' (uç-bağımsız filtreleme) davranışına sahip. Dahili istemci herhangi bir dış adrese tek bir giden paket gönderdikten sonra hangi gelen trafiğe izin verilir?",[197,199,201,203],{"key":154,"text":198},"Sadece aslen iletişim kurulan tam dış IP ve porttan gelen yanıtlar",{"key":157,"text":200},"İkinci bir giden paket gönderilene kadar asla hiçbir gelen trafiğe izin verilmez",{"key":160,"text":202},"Sadece iletişim kurulan tam IP'den, herhangi bir porttan gelen yanıtlar",{"key":163,"text":204},"Eşlenmiş dahili adresi hedefleyen, herhangi bir dış IP ve porttan gelen paketler","RFC 4787, Endpoint-Independent Filtering'i, giden bir paket eşlemeyi açtıktan sonra dış kaynak IP veya port ne olursa olsun dahili eşlemeyi hedefleyen her paketin iletilmesi olarak tanımlar.",{"id":207,"topic":9,"difficulty":150,"body":208,"options":209,"correct_key":157,"explanation":218},"01a039c8-9f1c-7e33-8393-c54bee9e0a13","RFC 4787'nin REQ-5 gereksinimine göre, bir NAT'ın UDP eşleme zamanlayıcısı için izin verilen minimum ömür nedir (belirli iyi bilinen port istisnası dışında)?",[210,212,214,216],{"key":154,"text":211},"30 saniye",{"key":157,"text":213},"İki dakika",{"key":160,"text":215},"10 dakika",{"key":163,"text":217},"Minimum yoktur","REQ-5, bir NAT UDP eşleme zamanlayıcısının iki dakikadan daha kısa sürede dolmaması GEREKTİĞİNİ (MUST NOT) belirtir; varsayılan olarak beş dakika veya daha fazlası önerilir.",{"id":220,"topic":9,"difficulty":168,"body":221,"options":222,"correct_key":160,"explanation":231},"01a039c8-9f1d-7ccd-9c1b-3f79f543fe3e","RFC 4787'nin REQ-6 gereksinimi bir NAT eşlemesinin 'Outbound refresh behavior'ının true olmasını ister. Pratikte, bir P2P istemcisi boşta kalan bir bağlantıda NAT eşlemesinin sona ermesini önlemek için ne yapmaya devam etmelidir?",[223,225,227,229],{"key":154,"text":224},"Hiçbir şey; sadece gelen trafik eşlemeyi tazeler",{"key":157,"text":226},"Soketi birkaç saniyede bir tamamen kapatıp yeniden açmak gerekir",{"key":160,"text":228},"O eşleme üzerinden periyodik paket göndermek",{"key":163,"text":230},"NAT üreticisinden portunu beyaz listeye almasını istemek","REQ-6 giden yönlü tazeleme davranışını istediğinden, yalnızca dahili taraftan dış tarafa giden paketler eşleme zamanlayıcısını sıfırlar; bu yüzden istemci eşlemeyi açık tutmak için periyodik giden paket (keepalive) göndermeye devam 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