📝 Section Review: Multicast & QoS
اہم نکاتKey TakeawaysKey Takeaways
- PIM-SM: پہلے RP کے ذریعے shared tree، پھر بہترین راستے کے لیے source tree پر switchover۔PIM-SM: pehle RP ke zariye shared tree, phir behtareen raste ke liye source tree par switchover.PIM-SM: shared tree via RP first, then switchover to the source tree for optimal paths.
- MSDP مختلف ڈومینز کے RPs کو جوڑتا ہے؛ Anycast-RP RP redundancy کا بہترین طریقہ ہے۔MSDP mukhtalif domains ke RPs ko jorta hai; Anycast-RP RP redundancy ka behtareen tareeqa hai.MSDP connects RPs of different domains; Anycast-RP is the best RP redundancy method.
- MQC: class-map (match) → policy-map (act) → service-policy (apply)۔MQC: class-map (match) → policy-map (act) → service-policy (apply).MQC: class-map (match) → policy-map (act) → service-policy (apply).
- Mark source کے قریب کریں؛ inbound پر police، outbound پر shape۔Mark source ke qareeb karein; inbound par police, outbound par shape.Mark close to the source; police inbound, shape outbound.
خود جانچ (مشق)Self-Check (Practice)Self-Check (Practice)
یہ مشقی سوالات ہیں، امتحانی سوالات نہیں۔These are practice questions, not exam questions.These are practice questions, not exam questions.
❓ (*,G) اور (S,G) میں کیا فرق ہے؟(*,G) aur (S,G) mein kya farq hai?What is the difference between (*,G) and (S,G)?
Shared tree (*,G): receiver پہلے RP سے جڑتا ہے۔ Source tree (S,G): براہ راست source تک سب سے چھوٹا راستہ۔Shared tree (*,G): receiver pehle RP se jurta hai. Source tree (S,G): direct source tak sab se chhota rasta.Shared tree (*,G): receivers join the RP first. Source tree (S,G): shortest path directly to the source.
❓ Anycast-RP کو MSDP کے ساتھ کیوں جوڑا جاتا ہے؟Anycast-RP ko MSDP ke saath kyun jora jata hai?Why pair Anycast-RP with MSDP?
Anycast-RP سے receivers قریبی RP سے جڑتے ہیں؛ MSDP RPs کے درمیان active-source info sync کرتا ہے۔Anycast-RP se receivers qareebi RP se jurte hain; MSDP RPs ke darmiyan active-source info sync karta hai.Anycast-RP lets receivers join the nearest RP; MSDP syncs active-source info between the RPs.
❓ Policing vs shaping — کون drop کرتا ہے، کون queue؟Policing vs shaping — kaun drop karta hai, kaun queue?Policing vs shaping — which drops, which queues?
Policing اضافی ٹریفک فوری drop کرتا ہے (inbound کے لیے)۔ Shaping queue کرتا ہے اور آہستہ بھیجتا ہے (outbound کے لیے)۔Policing extra traffic fori drop karta hai (inbound ke liye). Shaping queue karta hai aur dheere bhejta hai (outbound ke liye).Policing drops excess immediately (good for inbound). Shaping queues excess and sends it slower (good for outbound).
❓ Class-map، policy-map اور service-policy کیسے جڑتے ہیں؟Class-map, policy-map aur service-policy kaise jurte hain?How do class-map, policy-map, and service-policy fit together?
Class-map ٹریفک کو match کرتا ہے، policy-map ہر class کے لیے عمل طے کرتا ہے، service-policy انٹرفیس پر لگاتا ہے۔Class-map traffic ko match karta hai, policy-map har class ke liye action tay karta hai, service-policy interface par lagata hai.Class-map matches the traffic, policy-map defines actions per class, service-policy applies it to an interface.