Advanced Data Communication (UGC/NET)
Advanced networking protocols and data communication covering TCP, DNS, DHCP, SMTP, IMAP, BOOTP, and ATM technologies
Questions
The TCP window segment is expanded to _____ bits by the window scale option in TCP segment format.
- 8
- 16
- 32
- 48
- 60
In which of the following types of IP address allocations in DHCP protocol is the host address assigned by a network administrator?
- Manual allocation
- Automatic allocation
- Dynamic allocation
- Client hardware address
- Router IP address
Which of the following states of TCP connection is a waiting state or a close request state from the local application before sending a FIN?
- LISTEN
- CLOSE_WAIT
- SYN_SENT
- SYN_RECEIVED
- ESTABLISHED
Which of the following addresses in a BOOTP message format is the address of a BOOTP relay agent and not a general IP router to be used by the client?
- Client IP address
- Your IP address
- Server IP address
- Router IP address
- Client hardware address
Which of the following fields in TCP header specifies the number of data bytes beginning with the one indicated in the acknowledgement number field that the receiver is willing to accept?
- FIN
- Data offset
- Window
- Checksum
- Urgent pointer
Which of the following sends a time stamp value that indicates the current value of the time stamp clock of TCP?
- Window scale option
- Timestamps option
- SACK-permitted option
- SACK option
- Maximum segment size option
Which of the following fields in DHCP message format is set by the client to 0, incremented by a router that relays the request to another server and used to identify loops?
- Transaction ID
- Seconds
- Hops
- Flags field
- Length
Which of the following terms in an ATM network give(s) the information flow along the path set up as a series of pointers through the network?
- Cells
- Routing
- Hardware based switching
- Virtual connections
- End user interface
Which of the following types of port numbers is/are used by clients to initiate communication with servers?
- Well-known
- Ephemeral
- Sockets
- Game port
- SCSI
Which of the following is a selective acknowledgement that allows the receiver to inform the sender about all the segments that are received successfully?
- Maximum segment size
- Window scale
- SACK
- Timestamps
- SACK-permitted
Which of the following flags in DNS message format bit signals to the name server that recursive resolution is asked for and the bit is copied to the response?
- RA
- RD
- AA
- Zero
- QR
Which of the following fields in DNS message format is an unsigned 16-bit integer field specifying the number of entries in the question section?
- ANcount
- QDcount
- NScount
- ARcount
- ID
Which of the following keywords used in SMTP header field is basically the mailbox to which responses are to be sent?
- To
- Reply-to
- Return-path
- Subject
- Cc
Which of the following fields in DNS general resource record format is the one that specifies that time in seconds for which the resource record will be valid in a name server cache?
- TTL
- Class
- Type
- Name
- RDlength
Which of the following commands of IMAP4 is typically used to reset inactivity and autologout timer on server?
- CAPABILITY
- NOOP
- LOGOUT
- AUTHENTICATE
- LOGIN