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Which OSI layer header contains the address of a destination host that is on another
network?
A. Application
B. Presentation
C. Session
D. Transport
E. Network
F. Data link
G. Physical
When files are transferred between a host and an FTP server, the data is divided
into smaller pieces for transmission. As these pieces arrive at the destination host,
they must be reassembled to reconstruct the original file. What provides for the
reassembly of these pieces into the correct order?
A. The sequence number in the TCP header
B. The Start Frame Delimiter in the 802.3 Preamble
C. The TTL in the IP header
D. The acknowledgement number in the segment header
E. The frame check sequence in the Ethernet frame trailer
Network equipment supporting the use of flow control mechanisms has been
recently installed in the TestKing network. What is the purpose of flow control in a
data network?
A. It ensures that data is retransmitted if an acknowledgment is not received.
B. It reassembles segments in the correct order on the destination device.
C. It provides a mechanism for the receiver to control the transmission speed.
D. It regulates the size of each datagram segment.
E. All of the above are functions of flow control
As a CCNA candidate, you will be expected to know the OSI model very well.
Which of the following are associated with the application layer (layer 7) of the OSI
model? (Choose two)
A. TCP
B. Telnet
C. FTP
D. Ping
E. IP
F. UDP
You need to describe the various types of flow control to your co-workers. Which of
the following are types of flow control that can be used in a network? (Choose three)
A. Congestion avoidance
B. Windowing
C. Cut-through
D. Buffering
E. Load Balancing
F. Fast Forward
Which fields are included in the TCP header? (Choose three).
A. Source Port
B. Acknowledgement Number
C. Request Number
D. Destination Address
E. Window
F. Data
Acknowledgements, sequencing, and flow control are functions that are handled by
which layer of the OSI model?
A. Layer 5
B. Layer 4
C. Layer 7
D. Layer 6
E. Layer 3
F. Layer 2
G. Layer 1
A receiving host has failed to receive all of the segments that it should acknowledge.
What can the host do to improve the reliability of this communication session?
A. Start a new session using UDP
B. Obtain a new IP address from the DHCP server
C. Use a different source port for the session
D. Decrease the sequence number
E. Decrease the window size
You have set up an Internet based FTP server, where people can upload and
download files. In terms of the OSI model, what is the highest layer used during the
FTP sessions.
A. Application
B. Presentation
C. Session
D. Transport
E. Internet
F. Data Link
G. Physical
ICMP is often used in troubleshooting and verifying network. What statements are
true regarding ICMP packets? (Choose two)
A. They acknowledge receipt of TCP segments.
B. They guarantee datagram delivery.
C. They can provide hosts with information about network problems.
D. They are encapsulated within IP datagrams.
E. They are encapsulated within UDP datagrams.
F. They are encapsulated within TCP datagrams.
When files are transferred between a host and an FTP server, the data is divided
into smaller pieces for transmission. As these pieces arrive at the destination host,
they must be reassembled to reconstruct the original file. What provides for the
reassembly of these pieces into the correct order?
A. The sequence number in the TCP header
B. The Start Frame Delimiter in the 802.3 Preamble
C. The TTL in the IP header
D. The acknowledgement number in the segment header
E. The frame check sequence in the Ethernet frame trailer
FTP, Telnet, DNS, and SMTP are all protocols being used in the TestKing network.
Of these, which uses both TCP and UDP ports?
A. Telnet
B. FTP
C. DNS
D. SMTP
E. None of the above
Although TCP segments are similar to UDP segments, TCP packets contains some
additional fields. Which of the following are found in a TCP header, but not in a
UDP header? (Choose three)
A. Checksum
B. Sequence number
C. Destination port
D. Window size
E. Acknowledgment number
F. Source port
TestKing is installing IP phones in a new office. The phones and office computers
connect to the same device. To ensure maximum throughout for the phone data
sessions, the company needs to make sure that the phone traffic is on a different
network from that of the office computer data traffic. What is the best network
device to which to directly connect the phones and computers and what technology
should be implemented on this device? (Choose two)
A. VLAN
B. Subinterface
C. STP
D. Hub
E. Switch
F. Router
G. Wireless Access Point
H. VTP
The corporate head office of TestKing has a teleconferencing system that uses VOIP
(voice over IP) technology. This system uses UDP as the transport for the data
transmissions. If these UDP datagrams arrive at their destination out of sequence,
what will happen?
A. UDP will send an ICMP Information Request to the source host.
B. UDP will pass the information in the datagrams up to the next OSI layer in the order
that they arrive.
C. UDP will drop the datagrams.
D. UDP will use the sequence numbers in the datagram headers to reassemble the data in
the correct order.
E. UDP will not acknowledge the datagrams and wait for a retransmission of the
datagrams.
Which IOS user EXEC command will allow a network technician to determine
which router in the path to an unreachable network host should be examined more
closely for the cause of the network failure?
A. TestKingB> telnet
B. TestKingB > ping
C. TestKingB > trace
D. TestKingB > show ip route
E. TestKingB > show interface
F. TestKingB > show cdp neighbors
