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- 1. Multiple Choice
If a protocol keeps no information after processing each packet/segment/request, it is called a stateless protocol.
Which protocols are stateless?
HTTP/1.1
DNS (consider authoritative servers only)
TCP
UDP
- 2. Multiple Choice
Which components use retransmission timers?
HTTP client
HTTP server
DNS caching resolver
DNS authoritative server
- 3. Multiple Choice
A web browser sets up a TCP connection to fetch data from a web server.
Assuming HTTP/1.0 is in use: a single TCP segment sent by the browser can carry 2 HTTP requests
True
False
- 4. Multiple Choice
A web browser sets up a TCP connection to fetch data from a web server.
Assuming HTTP/1.1 is in use: a single TCP segment sent by the browser can carry 2 HTTP requests.
True
False
- 5. Multiple Choice
Our department owns the DNS domain cs.ucla.edu, and the IP address block 131.179/16 (i.e all the IP addresses between 131.179.0.0 to 131.179.255.255).
Any host with a DNS name xxx.cs.ucla.edu can be reached by an IP address in the 131.179/16 block.
True
False
- 6. Multiple Choice
Our department owns the DNS domain cs.ucla.edu, and the IP address block 131.179/16 (i.e all the IP addresses between 131.179.0.0 to 131.179.255.255).
Any host with an IP address in the 131.179/16 block has a DNS name that is served by cs.ucla.edu domain’s authoritative servers.
True
False
- 7. Multiple Choice
A TCP connection is established between nodes A and B, as such each of them holds multiple pieces of connection state information (such as the sequence number of latest acknowledgment sent/received, flow control window size, etc).
A and B hold identical connection state information all the time
A and B hold different connection state information all the time
The connection state information at A and B can be the same at some time, and different at some other time.
- 8. Multiple Choice
________is used when speed is the primary importance, such as real-time video
conferencing, streaming audio and video, Voice Over IP (VOIP), music, and online games.
High latency networkTCP
Slow network speedUDP
- 9. Multiple Choice
What is the purpose of an NS DNS record type?
To define the start of authority for a domain.To specify the mail exchange servers for a domain.To specify authoritative name servers for a domain.To assign IP addresses to domain names. - 10. Multiple Choice
What advantages does Anycast routing provide over Unicast for CDNs?
Allows clients to connect to server with shortest path
Provides better load distribution
Provides fault tolerance
Provides CDNs with extra security features
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