Netzwerke 2ter Test 14 Fragen 4 (nur multiple choice)

What is the meaning of an acknowledgement number N in the TCP header? Check all that apply:

Over which portions is the checksum within the TCP header calculated?

Which standard applications use TCP? Check all that applies:

How is the application process addressed? Check all that applies:

List at least 3 internet applications and their corresponding port numbers HTTP - 80 Telnet - 23 SMTP - 25 SSH - 22 DNS - 53 IMAP - 220

Which statements on port numbers are correct? Check all that applies:

Which statements on well-known and ephemeral ports are correct? Check all that applies:

Which statements on sockets are correct? Check all that applies:

Of what functions consists a UDP API? Creation of new receive ports Receive operation that returns Data Bytes Source Port Source IP Address Send operation that returns A pointer to the data bytes The destination port The destination IP address

List at least 4 TCP socket API function calls: Open (establishes TCP connection) Send (sends data from buffer via TCP connection) Receive (copies incoming TCP data to a user buffer) Close (closes the TCP connection) Status (dependable, return information, such as: local socket, foreign socket, window size, TCP connection state, ….) Abort (causes all pending send and receive operations to be aborted).

What are the 5 basic processes in a TCP socket implementation? Open a socket. Open an input stream and output stream to the socket. Read from and write to the stream according to the server's protocol. Close the streams. Close the socket

Which are no generic TLDs? Check all that apply:

What is contained within a resource record? Check all that apply:

If a local DNS server starts an iterative query, what is the correct order of inquired name servers? Check the correct answer.