Week 9 for Test 3
Which of the following statements about socket programming is not correct?
A socket descriptor can be used with every function that accepts a file descriptor argument.
The single most important motive for the new IPv6 protocol is:
Address space expansion
ARPA stands for
Advanced Research Projects Agency
In a layered protocol architecture (e.g., TCP/IP), a benefit and rationale for a module at one layer relying on another module at the layer below for some service is:
All of the Above
The ssh command
All of the Above
Which of the following is an application layer program designed to run on top of TCP:
All of the Above
Which of the following terms is used to denote units of data being transmitted:
All of the Above
You can display the domain names and IP addresses of the hosts on your computer network with the following command
All of the Above
Which of the following statements about socket programming is not correct? (2.0)
Applications with their own customized protocol headers cannot bypass the transport protocols (TCP and UDP, for example).
IPv4 addresses
Are 4-byte long Are 32-bit long Have classes A, B, C, D, and E
Which of the following statements about socket programming with datagram is not correct?
Datagram provides a connection-oriented service.
DNS is the acronym for
Domain Name Server
A service provided by TCP is:
Flow control
Which of the following statements about socket programming (address byte ordering) is not correct?
For a 32-bit integer with the value 0x04030201, the most significant byte is 0x01, and the least significant byte is 0x04 for little-endian byte order.
Which of the following statements about socket programming (socket descriptor) is not correct?
If the socket descriptor is in blocking mode, the application can use either poll or select to determine when the file descriptor is readable.
Which of the following is part of the syntax of a protocol (e.g., TCP/IP):
Its packet format
LAN stands for
Local Area Network
Which of the following statements about socket is not correct?
Many of the functions with file descriptors (e.g., read or write) will not work with a socket descriptor.
IP and ICMP are
Network layer protocols in the TCP/IP protocol suite
Which of the following is common to both TCP and UDP:
Port-to-port communication
As a data unit moves up from one protocol layer to another (e.g., for TCP/IP), control headers are:
Removed
RFC is an acronym for
Request for Comments
The main function of the IP protocol is
Routing
A protocol architecture (e.g., TCP/IP) performs a task by implementing it as:
Separate program modules, responsible for subtasks, that cooperate with each other
Which of the following statements about socket programming (out-of-band) is not correct?
TCP and UPD support out-of-band data.
Which of the following is an application layer protocol (e.g., in TCP/IP model).
Telnet
Which of the following statements about socket programming (socket address) is not correct?
The address associated with a client's socket must be known to the server with datagram.
Which of the following statements about socket programming (close and shutdown) is not correct?
The close function deallocates the network endpoint only when all the active references are closed.
To write code for port-to-port communication (e.g., TCP/IP), a programmer uses:
The socket application programming interface
TCP stands for
Transmission Control Protocol
UDP and TCP are protocols at the following layers in the TCP/IP protocol suite
Transport
Which of the following is a transport layer protocol (TCP):
UDP
URL stands for
Uniform Resource Locator
UDP stands for
User Datagram Protocol
Which of the following statements about socket programming (nonblocking & asynchronous IO) is not correct?
When the socket is in blocking mode, the poll or select functions should be used to send or receive data.
Which of the following statements about socket programming (accept function) is not correct?
accept provides non-blocking socket.
Which of the following statements about socket programming with SOCK_STREAM (TCP) is not correct?
after the connection in place, one can communicate to the other in one direction
The following command can be used to display information about the user Michael on the mit.edu host
finger [email protected]
You can determine the IP address of your computer on a UNIX machine by using the following command
ifconfig
IPv4 address 127.0.0.1 is for
localhost
This command ___ will tell you whether a host in Internet is up and responding, or not.
ping
You can test the status of network or a particular host with the following command
ping
___ allows processes running on different computers (connected to a common network) to communicate with one another.
socket
Which is not a classical method of IPC provided by various UNIX systems.
thread
TTL in ping command is
time to live
You can find the routing information of the hosts from the current host to the target host
traceroute