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csc flashcards chp2 Test

Enter the letter for the matching Answer
incorrect
1.
how does a web cache act as both client and server
incorrect
2.
does web cache act as a client or a server
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3.
what happens when an object is in cache
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4.
what did HTTP1.1 introduce
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5.
how does the HTTP1.1 server work
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6.
are methods, status codes and header fields different from HTTP/2 and HTTP1.1
incorrect
7.
how do cookies work with privacy
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8.
what is a web caches goals
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9.
how does loss recovery work
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10.
what does a server do if cached copy is up to date
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11.
what does HTTP/2 over single TCP connection mean
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12.
what type of security does HTTP/2 to HTTP/3 have
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13.
how does web caches work
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14.
what is the main goal of HTTP/2
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15.
what does HTTP/3 add to HTTP/2
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16.
are unrequested objects pushed to clients in HTTP/2
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17.
what method is used to transmit requests in HTTP/2
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18.
how do you keep state
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19.
what are the four main components of a cookie
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20.
are notion of multi-step exchanges of HTTP messages to complete a web transaction needed
A.
user configures browser to point to a web cache / browser sends all HTTP requests to cache
B.
it returns object to the client
C.
both
D.
works on a first come first served scheduling (FCFS) to "get" requests, small object may have to wait for transmission behind larger objects (head-of-line blocking)
E.
no because HTTP "get" response interaction is stateless
F.
response contains no object
G.
yes
H.
it retransmits lost TCP which in turn stalls other object transmission
I.
decreased delay in multi-object HTTP requests
J.
no security over vanilla TCP connection
K.
multiple, pipelined "gets" over a single TCP connection
L.
recovery from packet loss still stalls all object transmissions / opposite to HTTP1.1 browsers open multiple parallel TCP connections to reduce stalling and increase overall throughput
M.
cookies permit sites to learn a lot about you on their site / third party persistent cookies allow common identity to be tracked across multiple websites
N.
adds security, per object error and congestion control which means more pipelining over UDP
O.
protocol endpoints, help in maintain state at sender and receiver over multiple transactions / cookies, HTTP messages carry state
P.
no
Q.
requested objects based on client-specified object priority, doesn't use FCFS
R.
cookie header line of HTTP response message / cookie header line in next HTTP request message / cookie file kept on users host managed by users browser / back-end database at website
S.
server for original requesting client / client to origin server
T.
satisfy client request without involving origin server
Type the Answer that corresponds to the displayed Question.
incorrect
21.
what is not needed for client/server to do from a partially-completed-but-never-completely-completed transaction
incorrect
22.
are all HTTP requests independent or dependent on each other
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23.
what is not needed for a server or client to track in a multi-step exchange
incorrect
24.
what do websites and client browsers use to maintain some state between transactions
incorrect
25.
next section = email / SMTP / IMAP
incorrect
26.
what does HOL stand for regarding transmission
incorrect
27.
examples on slides 38>41 on how to calc. access link utilization

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