1.a boy or man;
that chap is your host
2.a long narrow depression in a surface
3.a crack in a lip caused usually by cold
4.(usually in the plural) leather leggings without a seat; joined by a belt; often have flared outer flaps; worn over trousers by cowboys to protect their legs
1.crack due to dehydration;
My lips chap in this dry weather
CHAP全稱是PPP(點(diǎn)對(duì)點(diǎn)協(xié)議)詢問(wèn)握手認(rèn)證協(xié)議 (Challenge Handshake Authentication Protocol)。該協(xié)議可通過(guò)三次握手周期性的校驗(yàn)對(duì)端的身份,可在初始鏈路建立時(shí)完成時(shí),在鏈路建立之后重復(fù)進(jìn)行。通過(guò)遞增改變的標(biāo)識(shí)符和可變的詢問(wèn)值,可防止來(lái)自端點(diǎn)的重放攻擊,限制暴露于單個(gè)攻擊的時(shí)間。