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TCP ise sıkı sıralama yerine ham hızı önceliklendirir",{"key":178,"text":179},"b","TCP bağlantı üzerinden güvenilir ve sıralı teslimat sağlar; UDP datagram'ları teslim garantisi olmadan gönderir",{"key":181,"text":182},"c","TCP sadece sunucular arasında kullanılabilir; UDP tarayıcı-sunucu trafiği içindir",{"key":184,"text":185},"d","UDP payload'ı varsayılan olarak şifreler; TCP şifrelemeyi uygulamaya bırakır","TCP bağlantı kurar; acknowledgement ve retransmission ile verinin eksiksiz ve sıralı ulaşmasını garanti eder. UDP ise bağımsız datagram'lar gönderir; bu garantilerden vazgeçerek daha düşük overhead sunar. (a) şıkkı iki protokolü yer değiştirir — klasik bir tuzaktır.",{"id":188,"topic":9,"difficulty":189,"body":190,"options":191,"correct_key":184,"explanation":200},"019f56bb-b399-789e-9656-c1855bde5676",2,"Ürüne canlı video streaming ekliyorsun. Ara sıra frame kaybı kabul edilebilir ama ek gecikme kabul edilemez. Hangi transport protokolü daha uygundur ve neden?",[192,194,196,198],{"key":175,"text":193},"TCP — video frame'leri eksiksiz ve gönderildikleri sırayla ulaşmalıdır; güvenilir teslimat her türlü ek gecikmeye değer",{"key":178,"text":195},"TCP — UDP paketleri yerel ağ dışında genellikle engellenir",{"key":181,"text":197},"UDP — stream için ayrılmış bandwidth rezerve eder, frame'ler daha hızlı ulaşır",{"key":184,"text":199},"UDP — kaybolan frame'in retransmission ile gelmesini beklemek, frame'i işe yaramayacak kadar geciktirir","Gerçek zamanlı medyada retransmit edilen frame çoğunlukla gösterim zamanı geçtikten sonra ulaşır; onu atıp devam etmek daha iyidir — UDP'nin modeli tam olarak budur. TCP (a) kayıp paketleri kurtarırken stream'i bekletir; UDP bandwidth rezerve etmez (c).",{"id":202,"topic":9,"difficulty":203,"body":204,"options":205,"correct_key":181,"explanation":214},"019f56bb-b39a-7082-ab82-81fbe0db29aa",3,"TCP'nin three-way handshake'i (SYN, SYN-ACK, ACK) sırasında gerçekte ne olur?",[206,208,210,212],{"key":175,"text":207},"Client ve server, trafiği şifreleyecek cipher üzerinde anlaşır",{"key":178,"text":209},"Server, veri kabul etmeden önce client'ın kimlik bilgilerini doğrular",{"key":181,"text":211},"İki taraf bağlantı açmayı kabul eder ve sıralı teslimat için kullanılacak başlangıç sequence number'larını senkronize eder",{"key":184,"text":213},"Client, en az bir kopyanın ulaşması garanti olsun diye isteğini üç kez gönderir","Handshake iki ucun da hazır olduğunu netleştirir ve başlangıç sequence number'larını takas eder; TCP kayıp tespitini ve sıra korumayı sonradan bunlarla yapar. Cipher pazarlığı (a) TLS handshake'in işidir ve ancak TCP bağlantısı kurulduktan sonra çalışır.",{"id":216,"topic":9,"difficulty":171,"body":217,"options":218,"correct_key":175,"explanation":227},"019f56bb-b39c-7807-a3e8-8137f0ab9d24","TCP\u002FIP ağlarında port numarasının görevi nedir?",[219,221,223,225],{"key":175,"text":220},"Trafiğin host üzerindeki hangi uygulamaya (process'e) gideceğini belirler",{"key":178,"text":222},"Makineyi ağ üzerinde benzersiz olarak tanımlar, IP adresine göre önceliklidir",{"key":181,"text":224},"Paketlerin hedefte hangi sırayla birleştirileceğini belirler",{"key":184,"text":226},"Trafiğin hangi fiziksel network interface üzerinden geçeceğini seçer","IP adresi makineyi bulur; port ise trafiği o makinedeki belirli bir servise yönlendirir — örneğin web server'lar için 80 ve 443. Paketleri sıraya dizmek (c) portların değil TCP sequence number'larının işidir.",{"id":229,"topic":9,"difficulty":171,"body":230,"options":231,"correct_key":175,"explanation":240},"019f56bb-b39d-741b-9b1e-2c048849e477","HTTP ve HTTPS varsayılan olarak hangi portları kullanır?",[232,234,236,238],{"key":175,"text":233},"HTTP için 80, HTTPS için 443",{"key":178,"text":235},"HTTP için 443, HTTPS için 80",{"key":181,"text":237},"HTTP için 8080, HTTPS için 8443",{"key":184,"text":239},"HTTP için 25, HTTPS için 22","Varsayılanlar 80 ve 443'tür; URL'lerde normalde yazılmamalarının sebebi budur. 8080 ve 8443 (c) yaygın alternatif\u002Fgeliştirme portlarıdır ama varsayılan değildir; 25 ve 22 (d) SMTP ile SSH'a aittir.",{"id":242,"topic":9,"difficulty":171,"body":243,"options":244,"correct_key":181,"explanation":253},"019f56bb-b39d-7a19-ac3a-7d35c64bf0c5","DNS'in temel görevi nedir?",[245,247,249,251],{"key":175,"text":246},"Her paket için en hızlı network rotasını seçmek",{"key":178,"text":248},"Bir sitenin TLS sertifikasının geçerliliğini doğrulamak",{"key":181,"text":250},"example.com gibi domain isimlerini IP adreslerine çevirmek",{"key":184,"text":252},"Ağa katılan bir makineye IP adresi atamak","DNS, insan tarafından okunabilir isimleri IP adreslerine çözer; client böylece nereye bağlanacağını bilir. Ağa katılan makineye adres dağıtmak (d) DHCP'nin işidir — sık karıştırılır.",{"fields":255,"seniorities":424,"interview_shapes":425,"locales":430,"oauth":432,"question_count":435,"coach_enabled":436,"jd_match_enabled":436},[256,267,287,303,327,340,359,378,398,405,411,418],{"key":5,"name_tr":6,"name_en":6,"sort":171,"specializations":257},[258,261,262,263,264,265,266],{"key":259,"name":260,"field":5},"general","Genel",{"key":154,"name":155,"field":5},{"key":166,"name":167,"field":5},{"key":157,"name":158,"field":5},{"key":150,"name":151,"field":5},{"key":160,"name":161,"field":5},{"key":163,"name":164,"field":5},{"key":268,"name_tr":269,"name_en":269,"sort":189,"specializations":270},"frontend","Frontend",[271,272,275,278,281,284],{"key":259,"name":260,"field":268},{"key":273,"name":274,"field":268},"javascript","JavaScript",{"key":276,"name":277,"field":268},"typescript","TypeScript",{"key":279,"name":280,"field":268},"react","React",{"key":282,"name":283,"field":268},"vue","Vue",{"key":285,"name":286,"field":268},"angular","Angular",{"key":288,"name_tr":289,"name_en":289,"sort":203,"specializations":290},"fullstack","Fullstack",[291,292,293,294,295,296,297,298,299,300,301,302],{"key":259,"name":260,"field":288},{"key":154,"name":155,"field":5},{"key":166,"name":167,"field":5},{"key":157,"name":158,"field":5},{"key":150,"name":151,"field":5},{"key":160,"name":161,"field":5},{"key":163,"name":164,"field":5},{"key":273,"name":274,"field":268},{"key":276,"name":277,"field":268},{"key":279,"name":280,"field":268},{"key":282,"name":283,"field":268},{"key":285,"name":286,"field":268},{"key":304,"name_tr":305,"name_en":305,"sort":306,"specializations":307},"devops-cloud","DevOps \u002F Cloud",4,[308,309,312,315,318,321,324],{"key":259,"name":260,"field":304},{"key":310,"name":311,"field":304},"aws","AWS",{"key":313,"name":314,"field":304},"gcp","GCP",{"key":316,"name":317,"field":304},"azure","Azure",{"key":319,"name":320,"field":304},"kubernetes","Kubernetes",{"key":322,"name":323,"field":304},"terraform","Terraform",{"key":325,"name":326,"field":304},"linux","Linux",{"key":328,"name_tr":329,"name_en":329,"sort":330,"specializations":331},"ai-engineer","AI Engineer",5,[332,333,334,337],{"key":259,"name":260,"field":328},{"key":166,"name":167,"field":328},{"key":335,"name":336,"field":328},"llm-rag","LLM\u002FRAG",{"key":338,"name":339,"field":328},"mlops","MLOps",{"key":341,"name_tr":342,"name_en":343,"sort":344,"specializations":345},"database","Veritabanı","Database",6,[346,347,350,353,356],{"key":259,"name":260,"field":341},{"key":348,"name":349,"field":341},"postgresql","PostgreSQL",{"key":351,"name":352,"field":341},"mysql","MySQL",{"key":354,"name":355,"field":341},"mongodb","MongoDB",{"key":357,"name":358,"field":341},"redis","Redis",{"key":360,"name_tr":361,"name_en":362,"sort":363,"specializations":364},"mobile","Mobil","Mobile",7,[365,366,369,372,375],{"key":259,"name":260,"field":360},{"key":367,"name":368,"field":360},"ios-swift","iOS (Swift)",{"key":370,"name":371,"field":360},"android-kotlin","Android (Kotlin)",{"key":373,"name":374,"field":360},"flutter","Flutter",{"key":376,"name":377,"field":360},"react-native","React Native",{"key":143,"name_tr":144,"name_en":379,"sort":380,"specializations":381},"Security",8,[382,383,386,389,392,395],{"key":259,"name":260,"field":143},{"key":384,"name":385,"field":143},"appsec","AppSec",{"key":387,"name":388,"field":143},"offensive-pentest","Offensive \u002F Pentest",{"key":390,"name":391,"field":143},"cloud-security","Cloud Security",{"key":393,"name":394,"field":143},"devsecops","DevSecOps",{"key":396,"name":397,"field":143},"blue-team-incident","Blue Team \u002F Incident",{"key":399,"name_tr":400,"name_en":401,"sort":402,"specializations":403},"qa-test-automation","QA \u002F Test Otomasyonu","QA \u002F Test Automation",9,[404],{"key":259,"name":260,"field":399},{"key":406,"name_tr":407,"name_en":407,"sort":408,"specializations":409},"data-engineer","Data Engineer",10,[410],{"key":259,"name":260,"field":406},{"key":412,"name_tr":413,"name_en":414,"sort":415,"specializations":416},"game-dev","Oyun Geliştirme","Game Development",11,[417],{"key":259,"name":260,"field":412},{"key":419,"name_tr":420,"name_en":420,"sort":421,"specializations":422},"ml-engineer","ML Engineer",12,[423],{"key":259,"name":260,"field":419},[14,15,16],{"junior":426,"mid":428,"senior":429},{"questions":427,"median_sec":3},20,{"questions":427,"median_sec":3},{"questions":427,"median_sec":3},[10,431],"en",[433,434],"google","github",21750,true]