DOM is a platform-and language- 66 API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents (currently, definitions for HTML and XML documents are part of the specification). The document can be further processed and the results of that processing can be incorporated back into the presented 67 . DOM is a 68 -based API to documents, which requires the whole document to be represented in 69 while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large 70 documents that do not fit into the memory available for processing.
66.
A.specific
B.neutral
C.contained
D.related
A B C D
B
67.
A.text
B.image
C.page
D.graphic
A B C D
C
68.
A.table
B.tree
C.control
D.event
A B C D
B
69.
A.document
B.processor
C.disc
D.memory
A B C D
D
70.
A.XML
B.HTML
C.script
D.Web
A B C D
A
Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an 71 from a friend who asks you to open it. This is what happens with Melissa and several other similar e-mail 72 . Upon running, such worms usually proceed to send themselves out to e-mail addresses from the victim's address book, previous e-mails, web pages 73 . As administrators seek to block dangerous e-mail attachments through the recognition of well-known 74 , virus writers use other extensions to circument such protection. Executable (.exe)files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users. Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the 75 access to your network.
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