¥: 2002-05-16 | ۾: | 14250 | Ʈ | Ϸκ

޽ зӰ


( : Message Access Paradigms and Protocols)
Terry Gray
Director, Networks & Distributed Computing
University of Washington
<A HREF="[email protected]">[email protected]</A>
: 
̸
<A HREF="[email protected]">[email protected]</A>
  1. ü

    1993⿡ ó , ֱ Ʈ "Comparison Two Approaches to Remote Mailbox Access: IMAP vs. POP"̶ ̴. ޽ зӰ ݿ ڼ ̷ ϴ ̸ ¶ ۿ Ͽ ͳ Post Office Protocol(POP) Internet Message Access Protocol(IMAP) ϴ ̴.

    ޽ (, mailbox) ϱ ٸ з Ѵ. ٷ , ¶, ׸ disconnected̴. "" ۿ Ŭ̾Ʈ α׷(MAU,Mail User Agent) κ α׷ ǻͷ ޽ ޽ Ѵ. ¶ ۿ ޽ 鼭 Ŭ̾Ʈ α׷ Ͽ óȴ. ׸, disconnected ۿ Ŭ̾Ʈ ϰ, õ ޽ 纻 , ´. ׸, Ŀ ٽ Ͽ ( ) . ¶ΰ δ ٴ ٸ ð, ٸ ǻ͸ ϴ ̷ ̴ ſ ũ Ÿ.

    6-7 Ŭ̾Ʈ- ݿ ߿  ϳ ޽ ҿ ϱ Ͽ NFS ٸ ݰ ۽Ű ׵鸸 پ ݷ ȴ. ̵ ο Ͽ ̾߱ϴ ٸ ⼭ IMAP(Internet Message Access Protocol) POP(Post Office Protocol) Ͽ ٷڴ. ٿ ִٸ IMAP 캸 ſ ʷ ִ.

    ׸ (a)¶ΰ disconnected ޽ ڰ ǰ ִ Ȳ ſ ʿ ̸, (b) POP ¶ΰ disconnected ٿ ʴٴ Ͱ IMAP з θ Ǹ Ѵٴ ִ ̴. ׷ٰ ڰ POP Ͽ ǵ POP ó ΰ Ǿ ̷ ó ſ ̶ Ѵ. ٽ Ͽ ϰ Ѵٸ, ¶ΰ disconnected ߿伺 Ͽ ϰ IMAP ̾߱ зӿ شΰ ϰ ִ.

    ⿡ POP IMAP ִ ¶ΰ ؼ ʿ Ÿ´:

    ó:

    • ޽
    • ǥ Ǵ ޽ ÷
    • Ű ߰
    • ˸
    Ƽ :
    • INBOX Ӹ ƴ ٸ ó
    • (Ʈ///̸)
    • ̸ ٿ ; , NetNews, ťƮ.
    ¶ ȭ :
    • ü ޽ ٿε ޽
    • MIME ٵ κп
    • ݿ ˻ ۷ ּȭϱ
    ̷ ɵ ڰ ȭ ſ ¸ Ư ߿ϰ ٰ´. , ̴ Ҹ ̱⵵ ϴ.

    , IMAP -Ȯ ڰ ־ ο 䱸 ߻Ǹ IMAP Ȯ ִ.

    ׷Ƿ 츮 a) offline ٸ ϴ ޽ 䱸ǰ ִ ׷ û ʴ; b) IMAP offline Ӹ ƴ϶ online disconnected ۵ ϰ ִ; c) IMAP Ư- Ϲ ý ֿ Ѵ. ׸, (d) IMAP POP ϴ ū ̶ ̸ POP ̶ μ IMAP POP ϴ Ʈ ٴ ̴.

  2. ޽ з

    â ̸ ´ ޽ ü ú ǻͷ Ǵ ̸, ڴ ׵ б ؼ ǻͷ αϿ߸ Ͽ. ̷ θ ǰ , ̷ ū ѿҸ : ù°, Ȯ强 Ѵ. °, Mac PC ϴ ޽ ó α׷ Ѵ. ý 忡 ̸ ߿ ޵ ý 뼺 ̴. ⼭ ޵ α׷ ȣȯǸ ׷ ̴ ׷ ̽(GUI) ϴ° ý۰ ũž Ǵ ž ǻͿ ȯ ϴ ϴ° ̴.

    , ǻ ¸ Ű л ޽ ó . ׷, ׷ ϴ Ŭ̾Ʈ- ϱ , ѹ ̿Ǿ Ŭ̾Ʈ ޽ óϴ ٸ ϴ Ǿ Ѵ.

    ͳ RFC-1733 (޽ ó з) л ޽ ýۻ󿡼 ϰ ִ.

    • Disconnected

    ۿ, ޽ Ϲ Ҹ ҷ ޵Ǹ ũ̼ Ǵ ο ǻ ڴ ð ΰ Ͽ ޽ Ŭ̾Ʈ ӽ ٿεѴ. Ȯ ڸ, Ŭ̾Ʈ α׷(Ǵ MUA(Mail User Agent)), κ Ŭ̾Ʈ α׷ Ͽ ޽ ִ ޽ . , ޽ ó Ŭ̾Ʈ ӽ ̷.

    "¶" ۿ ޽ Ŭ̾Ʈ α׷ ѹ ׸ ð ؼ ޽ Ѵ.

    Disconnected ۿ, Ŭ̾Ʈ ϰ, ޽ ijø Ѵ. ׷ Ŀ ٽ ⸦ . ڴ "" ¿ ijø ۾ ̷ "" 𵨰 primary ޽ 纻 ܳ´ٴ ̰ Ŭ̾Ʈ α׷ Ŀ ٽ Ͽ Ŭ̾Ʈ ޽ ijÿ ޽ ¸ 絿Ͽ ٴ ̰ ִ. ¶ΰ disconnected ϰ迡 ڴ ׵ ư ִ; ׷, ϳ ۰ ȣȯ , ֳϸ ޽ Ŭ̾Ʈ ӽ ϵũ ķ ޽ Ǿ ̴.

    - (store-and-forward service) ⼭ ܰ ȣƮ 󿡼 α׷ ڷκ ȴ. Ű (drop point)κ ϴ ġ(Ϲ, PC Ǵ Mac) ( 䱸 ) ޽ ̵ϵ Ǿ. ǻͿ Ŀ ޽ ȴ.

    ڰ ׻ ϳ ǻͷκ Ͽ ϰ ǻͿ ׵ ޽ ù° 纻 ִ°Ϳ Ѵٴ Ÿ. ׷ , ٸ ð ٸ ǻͿ ׵ ޽ ҿ ʿ䰡 ְ ȴٰų, Ǵ ׵ ۵ϴ ǻͰ ޶ ׵ Ǵ ӽ ٸ ϰ ʹٸ, ̷ 쿡 ش ̴.

    ̴ ̸ ڴ 忡 ׵ ǻ͸ ٸ ǻ͸ ְų ߿ ִ ǻ͸ ִ. 츮 츮 ׷ ̰ 츮 ׷ ȸ ־ٸ ¶ ٰ (disconnected) з ϸ , ð ׸(Ǵ) ڿ ſ ϴٸ ִٰ Ѵ. Ǿ ¶ κ ð ϸ, disconnected ٰ ð 䱸Ѵ.

    Ʈ: "޽ ", "Ϲڽ", ׸ "" ǹ ȯǾ Ǿ "޽ " ϳ ̻ "Ϲڽ" " " ִ.

  3. ޽

    κ ο ǻͷ ޵Ǵ ޽ ׻ ۵ ( : "always up") Ͽ Ѵ. ̷ ü ٸ Ǿ ִ.  ǻ ޵ ٸ ǻͿ 쿡 ־ Ʈũ ޽ ʿ䰡 ִ. å ̿ ޽ ִ ( , , ũ ׷, ι Ǵ ߾ ) Ͽ ̷ Ѵ. ٸ ǻ͸ ޽ Ϳ ϴµ Ǿ ϴ°? ̷ ޽ (, INBOX) -޽ (saved-message folders) ο ȴ. ޽ Ϲ ī̺(archive) ޽ ϴ ε ̷ 쿡 ־ (set) ÿ Ѵ. ޽ ϴµ Ǵ ƾ߸ κ 쿡 ־ ϴ .

    :

    • Ϲ ý (, NFS, SMB)
    • Ư- ޽ (, POP, IMAP)
    ý ޽ ҿ ϴ ֻ ع Ͽ شٰ ϴ 쿡 ű⿡ Ѵ.

    ǻͿ ý ʴ´.

    ý ü ſ Ǿ ν ׻ ƴϴ.

    κ ý ο ϰų ü ִ Ϲ ϴ ʴ. ֳϸ, ý Ϲ ȭǾ ʱ ̸ ȯ Ϲ ݿ Ͽ ȯ ϴ Ұϴ. ׷Ƿ, Ŭ̾Ʈ α׷ Ư ¸ νϰ ⿡ ӵȴ.

     Ư ýۿ ų ִٴ ǸǾ.

    ý ݿ Ʈũ 뿪 ´. ̷ ߻dz ϸ ,Ư ڿ θ ϱ Ͽ Ʈ ۵ 쿡 ߻ȴ.

    ݴ, Ư- ϴ:

    • Ư ó ִ .
    • Ʈ ۵Ǵ ͷ ̱ Ŭ̾Ʈ μ
    • Ư ʰ ν
    • ̿Ǵ κ Ŭ̾Ʈ α׷ и
    ׷Ƿ, Ư- ȣȴ. ׷ ֿ Ʒ ִ:
    • ȣ/Ư- ַ,
    • X.400 P7 ޽ ,
    • ϳ ޽ .
    ⼭ - ַǿ ߵ ʱ Ͽ ٷ ʴ´. Դٰ, ̷ ͳݿ ̸ Ʈ̸ Ѵٴ Ŀ 츮 ̲ ȴ.

    , Ͽ X.400 ٵ źεȴ: ù°, P7 ſ ɰ Դٰ P7 ͳ ޽ ó ̶ ٴ X.400 ޽ ̱ ̴. X.400 Ϲΰ ͳݿ Ʈ̿ Ϸ X.400 O/R ּҸ ٷ ý ڵ ư . –  쿡 Ѵٰ Ѵ. (ͳݰ X.400 ޽ ó 񱳴 Ѱ踦  , ̿ڰ ͳ ݷμ ū Ը ΰ ޽ óϴ Ȯ Ʋ ̶ Ŭӿ ɸ ̶ ִ.)

    ǵ ͳ ޽ ó POP, DMSP IMAP 츮 ش.

    ߿ ǰ θ ˷ POP(Post Office Protoco)̸ RFC-918 1984 10 ǵǾ. ٸ зӰ POP ʱ ٵ ġ. ⼭ POP3 RFC-1725 ٰ ̸ ͳ 帧 ֽ POP3 Ѵ. ֱٿ ٿ ͵δ ޽ ڰ δ IMAP 4.0 ۵Ǵ ̴. POP з ϵ Ư Ǿ; ׷, ſ ɰ Ѱ踦 ִµ װ ٸ зӿ Ǿ Դ.

    л ý (DMSP, Distributed Mail system Protocol) 1986 3 RFC-984 ǵǾ. POPʹ ٸ DMSP ׸ θ PCMAIL θ ѵȴ. DMSP PCMAIL (disconnected) Ȱ ϱ Ͽ Ư Ǿ ׷Ը ˷.

    ͳ ޽ (IMAP, Internet Message Access Protocol) Ʈ п 1986⿡ 1988 7 ͼ RFC-1064 ȭǾ. IMAP Ŀ RFC-1733 ǵ IMAP4̴. IMAP ¶ ϱ ; , ʱ⿡ "IMAP" "Interactive Mail Access Protocol" Ÿ ̾ ̸ IMAP ִ Ÿ Ͽ 1993 IETF ǥȭ μ ٲ Ǿ. IMAP – ƴ – POP ɷ ۼ̱ POP ϴ ó IMAP ϸ IMAP4 disconnected Ѵ. , IMAP POP DMSP ̴.

  4. ¶ΰ (disconnected) ۿ ʿ 䱸

    ¶ ޽ ġ Į ִ ó ִ ޽ Ҹ ٷ ɷ 翬 ־ Ѵ. տ ޵Ǿ , ַ Ϲ ý ݿ ʰ Ǿ Ѵ. ׷ٸ ̿ڰ ǰ Ŭ̾Ʈ- ޽ ó ý ϴ (Ǵ, йи) Ϸ Ѵٸ  ʿ ɱ? Ƹ ̰ Ʒ Ͽ Ѵ:

    • , ¶, ׸ disconnected .
    • ݿ ʴ ( ) Ŭ̾Ʈ
    • ޽ , , ׸
    • ޽
    • ڽ( ) .
    • ¶ ȭ.
    •  Ʈ̸ ϴµ ͳ ǥذ Ϻ ȣȯ.
    ͳݿ ޽ SMTP(Simple Mail Transfer Protocol) Ͽ ̷. SMTP ޽ ݷ ű⿡ ̷ ɼ Ư ̰ POP IMAP ȴ. , ϰ ϴ и ݿ . IMAP 쿡, IMSP(Internet Message Support Protocol) Ҹ ̰ Carnegie Mellon п Ǿ. ׷Ƿ, ӵǴ ߽ Ǵ Ŭ̾Ʈ Ǿ ɿ ٰ ̴.

    Disconnected ¶ ۰ 䱸 ű⿡ ߰Ͽ ð ؼ ޽ Ư ϰ Ǿ 䱸Ѵ. ̰ Ŭ̾Ʈ ֱ Ư ޽ ¿ ϱ ̴.

  5. POP IMAP

    ݵ ȣȯ ƴϰ ߴ ű⿡ ϰ ִ:

    • ٸ ٷ; SMTP Ѵ.
    • Ҹ "always up" ޵ȴ.
    • پ Ŭ̾Ʈ ÷ ·κ ο Ͽ Ѵ.
    • Ʈ ҿ ο Ͽ Ѵ.
    • (ٿε ) Ϻ Ѵ.
    • Disconnected ޽ ĺڸ Ѵ.
    • ҽϱ Ͽ Ӱ ϴ ϴ.
    • PC, Mac, ׸ н ӽ Ŭ̾Ʈ α׷ Ѵ.
    • ϴ.
    • RFC Ͽ ǵ ̴.
    •  Ʈ̵ ʿ ͳ ̴.

  6. ¶ 忡 POP

    POP Ϸ ϴ ڿ з Ѱ Ʈ ¶ΰ disconnected ο POP ̿ϱ õ ← Դ. Ϲ ̰ POP Ϸ Ŭ̾Ʈ ӽ ޽ Ŀ װ " ܵε" Ǿ. ׷, POP ǰ ¶ Ǵ disconnected Ŭ̾Ʈ ؼ ſ ʼ  ɵ Ѵ. ̷ ַ :

    • ¶ ȭ
    POP ǻ ¶ 忡 ִ ޽ ʵ Ǵ POP ۿ ̶ Ǿ ʴ´. ֳϸ, ٸ ( ý) Ư ¶ Ͽ Ǿ 빮̴.

    ¶ 忡 POP μ ޽ ϴ (, Answered ǥ) ִ. Ŭ̾Ʈ α׷ ̷ ߿ ϸ POP ۿ ̷ ͵ ̷. ֳϸ POP ̷ ɿ ذ ϱ ̴. , ޽ ޽ üκ иǾ Ǿ Ǹ POP Ŭ̾Ʈ ͸ ϱ Ͽ ġ ÿ ִ ó ϱ ̴.

    ٸ μ ī̺ ޽ ϴ ִ. ī̺ ϴ ׻ ϴ ó Ŭ̾Ʈ- ޽ ó ֿ ٸ ð󿡼 ٸ Ŭ̾Ʈ ʿ䰡 ִٴ ̴. , ޽ ī̺ ϳ ̻ ǻͺ ÿ .

    ׷, POP ǻ ¶ 忡 ׷ ¶ ޽ ó ý Ͽ "" ī̺ ̴ Ǵ ó ̰Ͽ ǻ ¶ 忡 Ѵ. ̿ڴ Ͽ Ϲ ſ 뼺 ִ Ͽ ̰Ϳ ִٸ ̿ڴ ̻ POP ʿ ִ.

    POP ¶ ޽ ó ݷ ʾұ ¶ ̴ ɰ Ͽ ׸ ʿ . Disconnected ۿ ʿ δ ¶ 䱸 ۼ ִ. POP ֽ POP ̴ ׸ disconnected ۿ ʿ Ұ ޽ ĺڸ Ѵ disconnected ޽ ݿ Ͽ ɸ鿡 ſ .

  7. IMAP

    ¶/disconnected ۿ ɸ鿡 POP ϰԺ̳ IMAP ٺ ¶ Ǿ ſ δ. POP IMAP :

    :

    • ޽
    • ԰ȭ ޽ ÷׿ ޽ ÷
    • Ű ߰߿
    • ǥ
    :
    • INBOX ۱
    • (Ʈ///̸)
    • ̸ ٿ ; , NetNews,
    ¶ ȭ:
    • ü ޽ ٿε ޽ ľϿ
    • MIME ٵ κ
    • ˻ ɰ ۷ ̴
    • Դٰ IMAP Ȯ ϰ ־ ִ.
    ó ɷ¿ ȵ顦

    " ޽ ϴ "̶ ϳ ī̺ ޽ ִٴ ǹϸ INBOX ī̺ κ ޽ ǵ ǹѴ. ޽ ޽ 鿡 ǹ̰ .

    "԰ȭ Ǵ ޽ ÷ũ "ϴ ǹϴ α׷ Ư ޽ ִٴ ̴; , װ Ǿų, Ǵ ڷκ ߿ϴٰ Ǿų, Ǵ ǥø ִٴ Ѵ. IMAP ǥ ÷ ϸ Դٰ ÷׵ Ѵ.

    " Ű ߰߿ "Ѵٴ ڽ ϴ ޽ ٷ Ȳ ſ ߿ϴ. , ũ ڽ ó 䱸 Ѵ. ̷ 䱸 ޽ ݰ ڽ θ Ÿ. Ư, ڽ ´ ٸ κ ߻Ǵ ÷ Ͽ ϸ ޽ ÷װ Ǿ ǿ ̸ ǥϴ Ͽ Ѵ. IMAP κ ޴ ̿ ڽ Ŭ̾Ʈκ ߻ û ƴ ִٶ ٸ Ŭ̾Ʈ- ݰ еȴ; ڽ ° Ǿٶ ˸ û ͸ Ŭ̾Ʈ ־߸ Ѵ. ϴ 㰡Ѵٴ Ϳ ָ.

    ڽ ȭ ٸ " ˸(new mail notification)"̴. IMAP Ŭ̾Ʈ α׷ ڽ󿡼  , ڵ ˸ ķ ޵ ο Ͽ ˸ ӿ Ѵ.

    ¶ΰ disconnected ߿ ٸ ð ٸ ǻͷκ ޽ ϴµ ִ. ̰ ο Ҵ Į ü ʴ ǻͿ Ͽ߸ ϴ ȯ л Ӹ ƴ϶ ȸ ٸ ǻ͸ ϴ 뵿ڵ Եȴ.

    ׷Ƿ, "INBOX ó" ¶ disconnected ̵ȴ. ̰ ̿ κ ٸ ޽ ִ ̸, Ϸ ޽ ִٴ ̸, ޽ Ѵٴ ǹѴ. " ޽ " ͸ ̿ϰų Ǵ ٸ ٸ ν ϴ Ʈ Դ 鿡 ϴ. ̿ INBOX ¶ disconnected ϴ Ͱ ̽ ٸ ޽ "incoming" Ǵ "archive" ǵ ȴ.

    " (Ʈ///̸)" ϳ ̻ ϰ ʿ伺 Ÿ. IMAP version 4 (set) ϴ " "Ѵ. Ŭ̾Ʈ α׷ ̸ 丮 ̸ ִ ɷ ֱ ̰ μ ̴.

    IMAP ߰ " ̸ Ϳ ϱ⿡ "; , NetNews, . ̷ ٸ ü踦 Ϸ 䱸 ִ 쿡 ȿ̴.

    ̿ڴ IMAP Ŭ̾Ʈ ý ڰ 䱸ϴ ŰĿ Կ ұϰ ̿ڴ ޽ Ŭ̾Ʈ ǻ , ִ.

    ¶ ȭ

    Ŭ̾Ʈ , ¶ 忡 Ǵ disconnected 忡 ij 絿⸦ ϴ Ʈũ Ͽ ̽ Ѵ – ̰ Ŭ̾Ʈ ӵ ſ ϰ Ÿ. IMAP Ŭ̾Ʈ ۵Ǵ ͷ ó ̴µ ִ Ѵ.

    ù°, "ü ޽ ٿε ޽ ִ "̴. ̰ ޽ Ŭ̾Ʈ MIME ޽ Ͽ ǥϰԲ Ѵ.

    Դٰ, " MIME ٵ κп " ǹѴ.  ſ 10MB ¥ ؽƮ ޽ Ͽٸ Ŭ̾Ʈ Ư û ʴ ̻ ؽƮε ¥ ޽ Ͽ ִٴ ̴. ȣڿ ̾ Ǿ ִ 쿡 ̰ ſ Ŀٶ ۿ ̴. MIME ޽ ȿ ó POP IMAP ֿ ̴. (MIME Multipurpose Internet Mail Extensions Ӹڿ Դ. ͳ ޽ ȣȯǴ RFC-822 SMTP ٿ ڵ Ͽ ؼ .) ٱμ , IMAP4 Ư ޽ ؼ Ѵ.

    , " ˻ ۷ ̱ " ̿ϱ IMAP Ʈ ɷ ϵǾ ȵǴٴ ̴. ̰ Ϲ (Ǵ ǻ ¶ 忡 POP) Ͽ Ư- ޽ ó ֿ ̴. Ŭ̾Ʈ- ˻ϵ ûϴ Ƽ Ͽ ˻ Ʈ Ŭ̾Ʈ Ͱ ۵ǵ ǹѴ. Ͽ ˻Ͽ ޽ ã ûϴ ſ Ŀٶ IMAP ̴.

  8. IMAP

    IMAP POP Ͽ :

    • Ͽ ν ϱⰡ .
    • POP Ʈ Ͽ IMAP Ʈ ׸ ʴ.
    IMAP ϹǷ IMAP ϴٴ 翬 ο Ͽ ⼺ پ: ù°, ̿ڴ Ŭ̾Ʈ Կ ұϰ ʿ . , ʱ IMAP Ŭ̾Ʈ߿ ϳ Minnesota κ POPmail̾. POPmail POP IMAP 常 ڴ IMAP ϴ ⼺ POP ȭϴ Ͱ ϴٴ ߰Ͽ. ° IMAP ׷߸ ҷμ IMAP ȭ ִ ̺귯 ȴٴ ̴. μ c-client ̺귯 п ִ.

    POP IMAP ް ű⿡ ̹ IMAP Ʈ ( ÿ) Ǵ ǰ POP Ʈ ϸ IMAP ϴ ۾ ϰ ִ. 20 ٸ IMAP Ŭ̾Ʈ ̸ ּ ϰ ̻ ߿ ִ.

  9.  źο ش

    IMAP ߾ ǻ äϰ ִٰ ϴ Ϲ ذ ִ. ̷ 󸶳 ο ǻ ߾ ǻ  ִٴ ̾߱ȴ. ̿ ߾ ǻ ȣ ׷ IMAP ƹ . , IMAP , ũ׷, μ, Ǵ -̵ μ ȴ. ⼭ å ̿ ޽ Ͱ ҿ Ǹ : ٸ ǻͷκ ޽ ϴµ Ǿ  ϳ? ׸ κ ٸ ǻͰ ִ: ǻ ڸ ϴ Ȳ ϳ ǻ͸ ϴ ϻ Ѵ.

    POP ϰ IMAP ׸ ġ ʴٴ 鸰. ֳϸ, IMAP ޽ Ͽ ٸ ϰ ֱ ̸ ̿ڰ ϰ 𸣴 ٸ Ͱ ϱ ̴. IMAP ذ簡 Ѵٴ ٸ 鿡 Ϲ ݷ δٴ  ŵ . Sun NFS, Transarc AFS, OSF DFS, Apple AFT, ũμƮ SMB, ׸ Novell NCP μ ױ ε ÷ DZ ư δ. ̷ 䱸 յȴ ű⿡ - ϴ ɻ Ѵ. , Ÿ ޽ ó ȯ Ͽ ׷ / Ư- ݻ󿡼 ذϴ . IMAP ó ϱ POP ϴ" ̷ϴ ̿ڰ θ 縦 Ѵٸ POP ̻ ʿ ȴٴ ̴.

    ȭ ׵ õ ̵Ѵٴ ̸ ׷ ٸ ׸ ʿ ʴٴ ̴. ߿ Ÿ ij 纻 ̵ϴ ſ ϴ ̿ڴ 󸶳 󿡼 *primary* 纻 Ǵ ñѴ. ̿ڰ Ű Ҿ ÿ ̿ ̸ Ҵ´ٴ ߸ ̴. ֳϸ, ڰ ׷ ǵ ʾ ׷ ǹ̸ ణ ̴. Դٰ, Ἲ ϸ ο Ҵ ü 䱸 شٰ ϱ . ⼭ ο Ҵ ü 䱸 ´ٴ Ͽ ֿ ó ϴ ʼ ִٴ ̴.

     ̵  ݵ ؼ Ǵ Ŭ̾Ʈ α׷ ⼺κ ߱ 䱸 ų ٴ ˰ Ǿ. ׵ Ǿ α׷ ۼϴ ׷  ϱ Ͽ ϰ ׷ Ǵ Ŭ̾Ʈ 䱸 ϱ Ϲݼ ϴ ãµ ޱϴ. ٽ ڸ, IMAP Ͱ ǵ Ȯ ¿ ̴ٶ ̴. ݴǴ Ǵ μ ǥ  α׷ Ű Ͽ Ѵٴ ý ڿԴ Ǹ ٰ´ٴ ̴. ֳϸ, ° ð ϴ Ͱ Ͽ ȹϴ ư ̴. , ũ 浹 ߱ ִ. ٿε ڵ带 ϴ ̿ڰ ̿ڴ 󿡼 ǰ ϴ 𵨿 Ͽ ѵȴ. , ޽ ؽƮ Ѵٸ Ŭ̾Ʈ ޽ ؽƮ ´ ijÿ . ٸ ڸ, Ϲݼ Ǹ, ݻ󿡼 Ư- о߸ ſ ó δ.

    World Wide Web ߵǾ װͰ õ HTTP(Hyper Text Transfer Protcol) Ϳ ߵǾִ. HTTP IMAP ? ȣ μ Ѵ. Web ڴ ϰԵ ׵ Ͽ URL ̿Ű Ͽ ܺ ǥ ؼ īο ϱ Ͽ. IMAP HTTP ÿ ׷ ȣ 踦 ִ. Ϲ WWW HTTP Ͽ ̸Ͽ ϴ ϴ ſ ִ ۾ Ǿ IMAP Ư- ڴ ߿ ̰ HTTP ٿ Ͽ Ÿ ִ.

    , ̿ڴ ִ: POP IMAP ÿ ϸ ȵǴ°? , ̷ ʱ Ʈ ȣȯ ϱ IMAP ϱ Ͽ Ʈ äõǾԴ. ű⿡ 󿡼 ÿ ϴ Ϳ Ư ڽ ˰ Ģ ̿ϴ 쿡 ־ ׷ . ׷, ű⿡ ϳ ϱ ִ: IMAP ϰų Ǵ POP ϰų ϴ Ʈ ÿ ϴ ʴ´; ׷Ƿ, 񽺰 ÿ ϴٸ Ŭ̾Ʈ л(diversity) Ͽ߸ Ѵ. ڿ ϴ ſ ִ ¿ ׵ ü ϱ ٴ Ϸ ߿ ϳ ϴ ʿ ̴.

  10. Ű Ʈ :

    • "" ޽ з 䱸 ϴ; "¶" "disconnected" ʼ̴
    • POP Ͽ , IMAP "" ϸ Դٰ "¶" "disconnected" Ѵ.
    ޽ з ߿ ̵ ð ũ 䱸 ּȭϴµ ִ. ·, ׻ ǻ͸ ϴ Դ ۵Ѵ; ٸ ð ӿ ٸ ǻͷκ Ͽ ̿ Ǵ ޽ ϱ ʴ. ٸ ǻͻ󿡼 ޽ Ϳ ϱ ý Ѵٸ ̰ ¶ΰ disconnected Ͽ Ư- ݰ "帷 ¶ "̴

    IMAP ׷ Ư- ̴; Ŭ̾Ʈ- ޽ ó ġ ڽ ÿ ִ ó ϴ Ǿ. з ϴ Ϳ ٿ IMAP մ ¶ ޽ Ͽ ʿ Ͽ ش. ̷ POP Ϸ ޽ ī̺ ޽ ġ ִ Ϲ ý ʴ ̻ .

    翬 . IMAP POP ϳ POP Ʈ ִٴ ̴. ׷, ̷ ſ ް ȭǰ IMAP POP ̷ ϰ ´.

  11. ʰ ʱ "Comparing Two Approaches to Remote Mailbox Acccess: IMAP vs. POP" URL ã ִ:

    http://www.imap.org/imap.vs.pop.brief.html

    RFC-1730 ǵ IMAP version 4. URL RFC ִ:

    ftp://ftp.internic.net/rfc/rfc1730.txt

    IMAP ߰ URL ִ:

    http://www.imap.org/imap.docs.html http://www.imap.org/products.html

    URL ִ 丮 ִ ͵:

    ftp://ftp.cac.washington.edu/mail/

    ũ ִ IMAP Ϲ POP 񽺸 ߰ ϸ IMAP Ͽ POP Ŭ̾Ʈ IMAP ֵ 㰡ϴ POP ̷ ִ.

    IETF Ͽ ǰ ִ POP ణ ϳ, ۼ ̷ ʾҴ. ֽ non-draft POP RFC-1725 ǵǾ ftp://ftp.internic.net/rfc/rfc1725.txt Ÿ ִ.



: ˻ (10363)2002-09-10
: IMAP POP (33323)2002-05-15
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