宁波大学计算机网络多选题.docVIP

1. The URL(Uniform Resource Locator) include: [ ]A. Protocol name [ ]B. Host name [ ]C. Path name [ ]D. User name [ ]E. Object name 2. TCP congestion control, there are those State in TCP Sender: [ ]A. Congestion Avoidance [ ]B. Fast recovery [ ]C. Slow Start [ ]D. Timeout [ ]E. GBN 3. When receive a segment in TCP Receiver, It can action with: [ ]A. Delayed ACK. [ ]B. Immediately send single cumulative ACK [ ]C. Immediately send duplicate ACK [ ]D. Immediate send ACK [ ]E. Nothing to do 4. Which are the Key Network-Layer Functions: [ ]A. forwarding [ ]B. routing [ ]C. Connection setup [ ]D. multiple access [ ]E. Address translator 5.IN DNS service, these servers are needed: [ ]A. Top-level domain (TLD) server [ ]B. Authoritative DNS servers [ ]C. Local Name server [ ]D. Proxy DNS server [ ]D. Root DNS server 1. Which Method types are in HTTP: [ ]A. GET [ ]B. POST [ ]C. SELECT [ ]D. PUT [ ]E. HEAD 2. TCP sender congestion control, there are these action in TCP Sender: [ ]A. window grows linearly [ ]B. window grows exponentially [ ]C. Threshold set to CongWin/2 and CongWin set to Threshold [ ]D. Threshold set to CongWin/2 and CongWin set to 1 MSS [ ]E. Threshold set to CongWin*2 and CongWin set to 1 MSS 3. TCP retransmission can be caused by: [ ]A. lost data [ ]B. lost ACK [ ]C. premature timeout [ ]D. premature ACK [ ]E. ACK 4. ICMP do not error reporting about: [ ]A. unreachable host [ ]B. unknown network [ ]C. unknown protocol [ ]D. unknown username [ ]E. unknown filename 5.For P2P file sharing, we can implement it by: [ ]A. Query flooding [ ]B. Queue flooding [ ]C. centralized directory [ ]D. decentralized directory [ ]E. CDNs directory 1. which are Wireless access networks: [ ]A. Wireless LANs [ ]B. UWB [ ]C. Wider-area wireless access [ ]D. Wireless mouse 2. In Client-server architecture, clients can be: [ ]A. Communicate with server [ ]B. Interm