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Category Archives: PPP

PPP implement


今天要來做PPP(Point-to-Point Protocol)的實作,在日常生活中也常使用,如PPPoE(PPP of Ethernet)就是個最好的舉例,而在網管的領域內,一般常用於不同廠牌的網路設備點對點橋接的時候使用,因Cisco專屬會使用HDLC(High Data Link Control,也稱cHDLC)的封裝格式來做傳輸,所以PPP也可以用來做Cisco與其他非Cisco的網路設備做橋接,而PPP傳輸的重點在於LCP(Link Control Protocol[用於身分認證])、NCP(Network Control Protocol[用於資料傳輸])與IPCP(Internet Protocol Control Protocol[用於資料傳輸])等,至於身分認證的部分,又有分成PAP(Password Authentication Protocol)與CHAP(Challenge Handshake Authentication Protocol)兩種,但前者是以明碼型式在做傳輸並只執行一次,後者則有使用雜湊演算法(Hash[MD5])來加密交握,因此上述說了可能各位看倌有聽沒有懂,直接欣賞一下實作可能會比較了解,如下: Read more »

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