*:96 Internet Application Protocols and Standards
Exam 1998-11-21 with suggested replies
No. | English text | Swedish text | Max points |
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1 |
Write an ASN.1 specification for an airline luggage tag. The luggage tag stores the name of the customer, the weight of the luggage in kilograms, and a series of one or more succeeding flights (two letters for the airline, 1-4 digits for the flight number, and 3 letters for the next airport). |
Skriv en ASN.1-specifikation för flygbagage. Varje etikett skall lagra kundens namn, bagagets vikt i kilogram, och en serie av en eller flera på varandra flygningar (två bokstäver för flygbolag, 1-4 siffror för turnumret och 3 bokstäver för nästa flygplats.) |
6 |
ReplyLuggageTag ::=
SEQUENCE { FlightSequence
::= SEQUENCE OF SEQUENCE { |
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No. | English text | Swedish text | Max points |
2 |
E-mail clients in personal computer usually will connect to a nearby mail server to send e-mail. They do not directly connect to a remote server close to the recipient, or to a server at a bridge to another net, even if the recipient is there. Why? |
E-postprogram i persondatorer brukar vanligen skicka ut utgående brev genom att koppla sig till en närbelägen server, inte genom att koppla sig direkt till en server nära mottagaren inte heller till en brygga för e-post till mottagare som inte kan nås direkt från Internet. Varför? |
6 |
Reply
Incorrect answers:Many students answered the question as if it had referred to getting incoming mail, not sending outgoing mail. POP and IMAP are not used for outgoing mail, and SMTP requires a computer to be up all the time only to be able to handle incoming mail. |
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No. | English text | Swedish text | Max points |
3 |
What is the difference in the way FTP clients and servers will handle data of ASCII and in IMAGE type. |
Hur skiljer sig hanteringen i FTP-klientrar och servrar vid hanteringen av ASCII data och IMAGE-data. |
6 |
Reply
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No. | English text | Swedish text | Max points |
4 |
A web document at URL http://foo.bar/alpha/beta contains the following code: |
Ett webbdokument på URL http://foo.bar/alpha/beta innehåller följande kod: |
6 |
<HEAD> <BASE href="http://foo.bar/alpha/gamma"> </HEAD><BODY> <A href="../delta/exit.html"> |
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Which document will be retrieved through the link in the body above? |
Vilket dokument kommer att hämtas via länken i <BODY> ovan.? |
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ReplyThe document at "http://foo.bar/delta/exit.html".
Incorrect answersA common error was to give the reply "http://foo.bar/delta/exit.html". This would have been correct if the <HEAD> had contained the statement <BASE href="http://foo.bar/alpha/gamma/">. But since there is no "/" after "gamma" this is a file name, not a directory, and is stripped before resolution. |