TCP/IP Protocols (190e40-3)

Which is the Internet protocol (IP) header protocol number used to specify that the packet's contents were created with transmission control protocol (TCP)?

6

The local transmission control protocol (TCP) process sends four segments, each 4 bytes long. The first sequence number is 7,806,002. Which is the acknowledgment number the receiving process returned to indicate it received segment one?

7,806,006

What provides user datagram protocol (UDP) with the ability to demultiplex data for an application?

A UDP destination port number.

Which addresses combine to create a transmission control protocol (TCP) socket?

IP and port.

How does the user datagram protocol (UDP) support multiple application destinations on the same host?

It carries port numbers in its header, used to logically address a destination application.

Which best describes transmission control protocol's (TCP) use of the Window header field?

It is bidirectional, so both ends can control data flow.

How does the transmission control protocol (TCP) receiver control the data flowing from the source?

It sets the receive window size with each ACK segment it returns.

Which statement best describes proxy address resolution protocol (ARP)?

Proxy ARP allows a router to answer an ARP request on behalf of a remote host.

Which address resolution protocol (ARP) feature allows the local host to maintain a mapping of recently discovered IP-to-media access control (MAC) addresses?

The ARP cache

The five steps of (1) obtaining logical addresses, (2) obtaining physical addresses, (3) establishing a connection between applications, (4) the transfer of information, and (5) the termination of the connection are necessary to accomplish what?

The transfer of information across a transmission control protocol/Internet protocol (TCP/IP) network.

Which user datagram protocol (UDP) port address do simple network management protocol (SNMP) agents use to send and receive management requests?

161.

Which of the following two ports are contained in the transmission control protocol (TCP) header?

Destination and source.

Which Internet protocol (IP) packet fragmentation header field specifies where the fragment belongs in the original datagram?

Fragment Offset

What is the primary difference between transmission control protocol (TCP) and user datagram protocol (UDP)?

TCP messages move across the network much more slowly than UDP messages.

Which portion of the transmission control protocol (TCP) header specifies the next sequence number the receiver expects from the connection source?

Acknowledgment number.

You know the logical address of an associate's computer on the company's local network and you want to learn the media access control (MAC) address of your associate's computer. Which of the following tools would you use?

Address resolution protocol (ARP).

Address resolution protocol (ARP) requests are sent as which type of Ethernet frame?

Broadcast

Which network segment hosts respond to an address resolution protocol (ARP) request?

Only the target host responds

A host on the local IP network segment has data to send to another host, located on another IP network. The source host needs to resolve the destination host's IP address to a media access control (MAC) address. Which protocol might the gateway router run in order to answer the local host's address resolution protocol (ARP) request?

Proxy ARP.

Which transmission control protocol (TCP) function forces data delivery before filling the transmit buffer?

Push

Which IP protocol allows a diskless workstation to contact a server and obtain an IP address?

Reverse address resolution protocol (RARP).

Which transmission control protocol (TCP) header control bit represents that the message is initiating a connection?

SYN.

What happens first when an IP host needs to resolve an IP address to a media access control (MAC) address?

The sending host looks in its address resolution protocol (ARP) cache for the necessary mapping.

Which statement best describes transmission control protocol's (TCP) use of sequence numbers?

They identify the sequence number of the first data byte in the segment.

A client Domain Name System (DNS) resolver wishes to resolve a Web server fully qualified domain name (FQDN) to an IP address. It sends its first message to its designated DNS server, requesting name to IP address resolution. This message contains: 1) The LAN protocol Data Link Layer header and trailer. 2) The IP header. 3) The user datagram (UDP) header. 4) The DNS resolver request. Why did the resolver send the DNS request in the first packet, rather than send an initial empty SYN packet?

UDP does not use SYN and ACK packets.

Which is a true statement concerning user datagram protocol (UDP)?

UDP servers must listen for service requests on well known ports, or else the transactions may fail.

Which best describes the user datagram protocol (UDP) demultiplexing process?

UDP uses port numbers to allow multiple applications to communicate simultaneously on the same host.