الفرق بين تردد 2.4 وتردد 5 جيجا هرتز في الراوتر WIFI

سلام تكنولوجي - Salam Technology September 7, 2023
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اهلا بيكم متابعينا الكرام في الفيديو ده هنتعرف علي الفرق بين تردد بث الـ 2.4 وتردد االـ 5 ghz لو بتفكر ستبدل جهاز الراوتر أو المودم (الموزع ) القديم في منزلك، أو تحديث الراوتر الذي ركبته لك الشركة المزودة لخدمات الإنترنت، ربما سمعت عن مصطلح مزدوج النطاق" (dual band) وهي تشير ان أن الموزع يستخدم النطاقين: 2.4 جيجاهيرتز وخمس جيجاهيرتزات لبث إشارة الإنترنت اللاسلكي (واي-فاي) فما الفرق بين النطاقين؟ وأيهما تستخدم؟ كل هذا سنتعرف عليه في هذا الفيديو tp link archer ax10 wifi ap tp link tl wa855re tp link wifi 6 huawei mesh d link ac1300 300mbps wi fi range extender tp link 4g lte mobile wifi tp link re650 extender d link tp link m7200 4g alfa awus1900 ac1900 huawei mobile wifi pro tp link re205 ac750 tp link extender re200 wifi extender xiaomi d link wifi tplink 7200 tapoc200 archer_c24 d link mesh archer axe75 tp link re 305 tp link ax10 tp link wi fi 7 tp link re450 psn 4 tp link archer axe75 xiaomi mi wi fi range extender pro re315 tp link wifi wireless wifi range extender ac1200 ac750 wi fi range extender xiaomi wifi extender pro tp link ax1500 wi fi pc extender wifi tp link re315 مفتاح الواي فاي واي فاي ٦ تيندا واي فاي may wifi ac1750 re450 tp wa855re re450 ac1750 tplink re700x re650 ac2600 huawei mobile wifi e5220 vodafone r207 wifi range extender xiaomi tp re450 tp link wifi 300mbps tp link 4g lte m7200 d link exo wa850re tp link wi fi mini huawei ac1200 tp link m7200 4g lte ont wifi 6 wi fi range extender tp link mobile wifi 4g wi fi range extender n300 راديو بدون إنترنت وبدون سماعات wifi 6 cisco aruba ap 505 rw xiaomi f490 4g lte mobile wifi extender wifi 6 tp link m7350 4g lte ac750 mesh wifi extender archer c24 ac750 microsd wifi ac750 re200 tp link m7350 4g tp link ac1200 wifi extender tp link tp link re700x dap 1620 mobile wifi 4g lte ax10 tp link ac1200 wifi re305 tp link extender wifi tp link tp link archer c24 ac750 tp link axe75 tp link re305 ac1200 huawei wifi q2 pro m7200 tp link wii fi psn 100 tp link 650 d link wifi 6 wifi hp psn 20 tp link ac1750 re450 psncard mobile wifi 5g tp link re315 ac1200 wifi enterprise wi fi portable إن الفرق الرئيسي بين النطاقين المذكورين هو السرعة؛ فتحت الظروف المثالية يوفر النطاق 2.4 غيغاهيرتز سرعة نقل بيانات تصل إلى 450 ميغابتا في الثانية أو حتى ستمئة ميغابت في الثانية، اعتمادا على نوعية الموزع، في حين يوفر النطاق خمس غيغاهيرتزات سرعة نقل تصل إلى 1300 ميغابت في الثانية. وبالطبع، يوجد هنا بعض المحاذير، فالسرعة القصوى التي قد تراها تعتمد أيضا على أي المعايير اللاسلكية التي يدعمها الموزع، وهي 802.11b, 802.11g، 802.11n أو 802.11ac، وهو المعيار الأحدث والأسرع بينها، أما المحذور الثاني فهو تلك العبارة المذكورة سابقا "الظروف المثالية". إن مجال النطاق 2.4 غيغاهيرتز مزدحم جدا لأنه مستخدم بأكثر من مجرد "الواي فاي"؛ فالهواتف اللاسلكية القديمة، وأجهزة التحكم عن بعد لفتح باب الكراج، وأجهزة مراقبة الأطفال، وغيرها الكثير، تستخدم جميعها النطاق 2.4 غيغاهيرتز. إن الموجة الطويلة التي يستخدمها النطاق 2.4 غيغاهيرتز تلائم أكثر المدى الطويل، والبث عبر الجدران والأجسام الصلبة، ولهذا فإنها أفضل إذا كنت تبحث عن نطاق تغطية أكبر لأجهزتك أو كان يوجد الكثير من الجدران أو الأجسام الأخرى في المكان الذي تحتاج فيه إلى التغطية. لكن لأن العديد من الأجهزة تستخدم النطاق 2.4 غيغاهيرتز، فإن الازدحام الناتج يمكن أن يؤدي إلى انخفاض جودة الاتصالات والحصول على سرعات أبطأ من المتوقع. في المقابل، فإن النطاق خمس غيغاهيرتزات أقل ازدحاما بكثير، مما يعني أنه من المرجح أن تحصل على اتصالات أكثر استقرارا، كما ستشاهد سرعات أعلى. لكن من ناحية أخرى، فإن الموجات الأقصر التي يستخدمها النطاق خمس غيغاهيرتزات تجعله أقل قدرة على اختراق الجدران والأجسام الصلبة، كما أن له مدى فعالا أقصر من النطاق 2.4 غيغاهيرتز. ويمكن بالطبع تقوية هذا المدى الأقصر باستخدام أجهزة إطالة المدى (range extender) أو أنظمة "واي فاي" شبكية، لكن هذا يعني تكلفة أكبر. والخبر الجيد هو أن معظم أجهزة الموزع الحديثة تملك خاصية "مزدوج النطاق"، ويستطيع المستخدم اختيار أي النطاقين ليكون فاعلا، كما يستطيع بعضها بث الإشارتين 2.4 وخمس غيغاهيرتزات بالتزامن، مما يعني شبكتي "واي فاي" يمكن للمستخدم اختيار إحداهما، وتتيح أجهزة أخرى للمستخدم تعيين اسم الشبكة (SSID) ذاته لكلا النطاقين، بحيث ترى الأجهزة شبكة واحدة حتى مع كون النطاقين قيد العمل.

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