Cov txheej txheem:

Dab tsi yog hom ACL?
Dab tsi yog hom ACL?

Video: Dab tsi yog hom ACL?

Video: Dab tsi yog hom ACL?
Video: Fibula Bone Graft | #fibula #fibulafracture #bonegraft #bonegrafting #bonesurgery #bonefracture #acl 2024, Lub peb hlis ntuj
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Muaj ntau ntau hom kev tswj xyuas cov npe thiab feem ntau yog txhais rau lub hom phiaj sib txawv lossis raws tu qauv. Ntawm Cisco routers, muaj ob hom tseem ceeb: txheem thiab txuas ntxiv. Cov no ob hom yog ACLs siv dav tshaj plaws thiab cov uas kuv yuav tsom mus rau hauv cov ntawv no thiab yav tom ntej, tab sis muaj qee qhov ACLs siab heev thiab.

Ib yam li ntawd ib tug yuav nug, dab tsi yog qhov sib txawv ntawm kev nkag mus tswj cov npe?

Muaj ob lub ntsiab sib txawv ntawm Access-list uas yog:

  • Standard Access-list - Cov no yog cov npe Access uas tau tsim los siv qhov chaw nyob IP nkaus xwb. Cov ACLs no tso cai lossis tsis lees paub tag nrho cov txheej txheem suite.
  • Extended Access-list - Cov no yog ACL uas siv ob qhov chaw thiab chaw nyob IP chaw nyob.

Ib sab saum toj, puas yog ACL firewall? Ib ACL zoo ib yam li Stateless Firewall , uas tsuas txwv, thaiv, lossis tso cai rau cov pob ntawv uas ntws los ntawm qhov chaw mus rau qhov chaw. ACLs muaj nyob rau hauv routers los yog firewalls , tab sis lawv kuj tuaj yeem teeb tsa lawv hauv txhua yam khoom siv uas khiav hauv lub network, los ntawm cov tswv, cov khoom siv network, servers, thiab lwm yam.

Ntxiv mus, tus qauv ACL yog dab tsi?

A standard ACL tuaj yeem tso cai lossis tsis lees txais trafiic tsuas yog nyob ntawm qhov chaw nyob. Ib qho txuas ntxiv ACL tuaj yeem tso cai lossis tsis lees txais kev thauj mus los raws li qhov chaw nyob thiab qhov chaw nyob raws li tcp/udp/icmp trafic hom.

ACL firewall yog dab tsi?

Access Control Lists (ACLs) yog ib phau ntawv tso cai thiab tsis kam lees tej yam kev mob, hu ua cov cai, uas muab kev ruaj ntseg los ntawm kev thaiv cov neeg siv tsis tau tso cai thiab tso cai rau cov neeg siv tau txais kev tso cai nkag mus rau cov peev txheej tshwj xeeb. Feem ntau ACLs nyob hauv a firewall router los yog hauv ib lub router txuas ob sab hauv network.

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