▁Def ense ▁applications ▁such ▁as ▁H F ▁/ ▁U H F ▁/ ▁V H F ▁Radio ▁based ▁M AN ET ▁Rad ios , ▁T act ical ▁data ▁links ▁etc . ▁▁ ▁L TE , ▁L TE ▁Advanced , ▁I OT , ▁V AN ET ▁simulations ▁▁ ▁Sat ellite ▁communication ▁ ▁Opt im ization ▁of ▁cache ▁pla cement ▁on ▁large ▁virtual ▁content ▁distribution ▁networks ▁ ▁Education ▁- ▁Online ▁courses , ▁Lab ▁experiment ation ▁and ▁R ▁& ▁D . ▁Most ▁univers ities ▁use ▁a ▁network ▁sim ulator ▁for ▁teaching ▁/ ▁R ▁& ▁D ▁since ▁its ▁too ▁expensive ▁to ▁buy ▁hardware ▁equipment ▁ ▁There ▁are ▁a ▁wide ▁variety ▁of ▁network ▁sim ul ators , ▁r anging ▁from ▁the ▁very ▁simple ▁to ▁the ▁very ▁complex . ▁ ▁Min im ally , ▁a ▁network ▁sim ulator ▁must ▁enable ▁a ▁user ▁to ▁ ▁Model ▁the ▁network ▁topology ▁specifying ▁the ▁nodes ▁on ▁the ▁network ▁and ▁the ▁links ▁between ▁those ▁nodes ▁ ▁Model ▁the ▁application ▁flow ▁( tra ffic ) ▁between ▁the ▁nodes ▁Prov iding ▁network ▁performance ▁metrics ▁as ▁output ▁Visual ization ▁of ▁the ▁packet ▁flow ▁Technology ▁/ ▁protocol ▁evaluation ▁and ▁device ▁designs ▁ ▁Log ging ▁of ▁packet / events ▁for ▁dr ill ▁down ▁anal ys es ▁/ ▁debugging ▁ ▁See ▁also ▁Channel ▁model ▁M ob ility ▁model ▁Network ▁em ulation ▁Network ▁topology ▁Network ▁traffic ▁simulation ▁Que ue ing ▁theory ▁Tra ffic ▁generation ▁model ▁W ire less ▁sensor ▁network ▁sim ul ators ▁ ▁References ▁ ▁External ▁links ▁ ▁Net Sim ▁ ▁Category : Comput er ▁networking ▁Category : T ele communic