Field Tech III - IV Conventional-TCP/IP PROTOCOLS (190E40-3)

How many fragments will the transmitting device have to create to match the datagram to the segment's 512 maximum transfer unit (MTU) size, having a 1,500-byte datagram, and a 20-byte IP header?

4

On an IP network, all hosts must be able to handle a packet size of at least how many bytes?

576

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

Which types of transmission control protocol (TCP) segments contain window size advertisements?

ACK

Which three parts of the transmission control protocol (TCP) header help the protocol ensure reliable communications between applications? (Choose three.)

ACK control bits Sequence numbers Checksum

Which three choices are transmission control protocol (TCP) features? (Choose three.)

Flow control. Packet error recovery. Demultiplexing multiple term-25applications.

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.

What happens if the retransmission timer set by the sending transmission control protocol (TCP) times out before it receives an acknowledgment.

It retransmits the outstanding segments.

How does a transmission control protocol (TCP) process handle a failed connection?

It sends an RST segment when the maximum retry count is exceeded.

How does a sending transmission control protocol (TCP) process handle a zero receive window size?

It sends periodic probe segments and waits for an ACK with a nonzero window size.

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 three of the following terms refer to a physical address? (Choose three.)

Media access control (MAC) address. Adapter address. Hardware address.

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

Only the target host responds

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.

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

The destination transmission control protocol (TCP) process has set a 1,000-byte receive buffer window. The source TCP sequence number starts at 23,100 and sends the following segments, in order: Segment 1-200 bytes; Segment 2-300 bytes; Segment 3-200 bytes; and Segment 4-300 bytes. The last acknowledgment the source received was sequence number 23,600 saying the receive buffer can now hold 800-300 byte streams. The retransmission timer for sequence number 23,600 has expired, so what will the source TCP do next?

Resend segments 3 and 4.

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

Reverse address resolution protocol (RARP).

Which type of packet does the receiving transmission control protocol (TCP) send to the source indicating its receipt of the source's SYN packet?

SYN-ACK

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

Which best describes IP's use of the time-to-live (TTL) field?

The TTL specifies the time a datagram is allowed to remain on the network.

Which statement best describes Handshake #1?

The initiator sends a SYN segment to the target host's transmission control process (TCP) process.

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.

What happens to a datagram marked as "do not fragment" if it must be transmitted across a network segment with a maximum transmission unit field (MTU) smaller than the datagram?

The transmitting network device will drop the datagram, and notify the source.

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.

Which three of the following applications utilize user datagram protocol (UDP)? (Choose three.)

Trivial file transfer protocol (TFTP). Simple network management protocol (SNMP). Domain Name System (DNS).

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

Acknowledgment number.

In TCP/IP, what does a network host use to find a physical address, given a logical address?

Address resolution protocol (ARP).

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

Broadcast

How does a diskless workstation identify itself when requesting an IP address using reverse address resolution protocol (RARP)?

By its media access control (MAC) address.

At which Open Systems Interconnection reference model (OSI/RM) layer does the physical address reside?

Data Link

Internet protocol (IP) provides which three of the following services to transmission control protocol (TCP)? (Choose three.)

Datagram routing. Time-to-live (TTL). Differentiated Services Code Point (DSCP).

Which IP packet bits does open shortest path first (OSPF) use to provide Type of Service (ToS) routing?

Delay, throughput, reliability, and cost (D-T-R-C) bits

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.

Which IP packet frame field ensures that the gateways handling a datagram agree on the datagram's format?

Version.

Transmission control protocol (TCP) establishes which type of circuit between applications?

Virtual