ET0030 2015/2016 SEM 2

Question 1

1. 
   
   Refer to the first 64 bytes of an Ethernet frame shown below.
   What protocol type is it carrying at the Network Layer?
   

   		IP
   		ARP
   		ICMP
   		PING

2 points  

Question 2

1. 
   

   Which of the following is a host address for the network 229.165.14.64/27?

   
   

   (a)       229.165.14.1                            

   
   

   (b)       229.165.14.64

   
   

   (c)       229.165.14.94

   
   

   (d)       229.165.14.95

   		229.165.14.1
   		229.165.14.64
   		229.165.14.94
   		229.165.14.95

2 points  

Question 3

1. 
   The figure below shows part of a captured Ethernet frame. Identify the ICMP message type.
   
   

   

   
   

            

   		Echo Request
   		Echo Reply
   		Destination Unreachable
   		Redirect

2 points  

Question 4

1. The OSI layer that is responsible for formatting and data encryption is the ________.
   
   

   
   

   
   

   		application layer
   		session layer
   		presentation layer
   		display layer

2 points  

Question 5

1. What data is contained in the ICMP data field of an ICMP echo request packet?
   
   

   		ASCII code representing alpha characters “123456……”
   		ASCII code representing alpha characters “abcdef……”
   		Binary values of 1, 2, 3, 4 ……
   		Random values

2 points  

Question 6

1.   From the given captured Wire shark packets bytes window, determine the destination port number . Is this a UDP port or a TCP port?
   

   		110, TCP port.
   		10239, UDP port
   		10239, TCP port
   		110, UDP port

2 points  

Question 7

1. Examine the following wire shark capture, identify the captured process.

   
   

   		ARP Request
   		Gratitious ARP Request
   		Gratitious Reply
   		ARP Reply

2 points  

Question 8

1. Examine the following wire shark capture, identify the captured process.
   
   
   

   		RARP Request
   		Gratitious ARP Request
   		ARP Reply
   		RARP Reply

2 points  

Question 9

1. 
   How many network(s) is/are there in this topology diagram?
   
   
   
   
   
   
   

   		1
   		3
   		4
   		5

2 points  

Question 10

1. Fragmented datagrams will be reassembled at ____________.

   		every router that they pass through
   		every switch that they pass through
   		every router and switch that they pass through
   		the destination host only

2 points  

Question 11

1. Fragmenting and reassembling datagrams based on the MTU of the underlying network is one of the functions provided by _______________.

   		UDP
   		IP
   		ICMP
   		TCP

2 points  

Question 12

1. From the displayed WireShark diagram, at packet 1, what process is happening between the source and the destination.
   

   		RIPv1 update
   		RIPv2 update
   		Ping process
   		OSPF update

2 points  

Question 13

1. From the given WireShark captured display, determine what is the destination IP of this packet.
   

   		0a.00.00.01
   		10.0.0.1
   		e0.00.00.09
   		224.0.0.9

2 points  

Question 14

1. From the given Wireshark diagram, determine what is the size of the TCP datagram ?
   
   
   

   		726
   		706
   		768
   		746

2 points  

Question 15

1. From the given Wireshark information, determine what is the source port number?
   

   		59139
   		59
   		22
   		4128

2 points  

Question 16

1. From the given Wireshark information, what is the destination port number?
   

   		59139
   		59
   		22
   		4128

2 points  

Question 17

1. From the given information, determine what is the size of ICMP data.
   

   		12
   		22
   		32
   		42

2 points  

Question 18

1. How many windows are maintained in a TCP connection?

   		1
   		2
   		3
   		4

2 points  

Question 19

1. Put the fields into the correct position for an Ethernet frame.
   

   
   

   - A. B. C. D. I Read Answer Items for Question 19 - A. B. C. D. II Read Answer Items for Question 19 - A. B. C. D. III Read Answer Items for Question 19 - A. B. C. D. IV Read Answer Items for Question 19

   Answer A. Transport Header B. Application Header C. IP Header D. User Data

2 points  

Question 20

1. Refer to the first 64 bytes of an Ethernet frame shown below.What is the MAC address of the sending host?

   
   

   		28-95-00-14
   		00-13-E8-DA-28-95
   		00-14-1C-83-D2-50
   		00-13-E8-DA

2 points  

Question 21

1. Refer to the wireshark output below. What is the size of the UDP datagram contained in the captured IP datagram?

   
   

   		20 bytes
   		70 bytes
   		40 bytes
   		50 bytes

2 points  

Question 22

1. From the given frames, determine what is the size of the TCP data?
   

   		19 bytes
   		40 bytes
   		54 bytes
   		59 bytes

2 points  

Question 23

1. The 4 sets of echo request and reply packets has the same _________________number because they belongs to packets generated from the same ping command.

   
   

   		Type
   		Identifier
   		Code
   		Sequence

2 points  

Question 24

1. The command which produced the output given in Figure A3 below is
   
   

   

   
   

   Figure A3

   
   

   		show ip route
   		show arp
   		show mac-address-table
   		show vlan

2 points  

Question 25

1. The figure below shows part of a captured Ethernet frame. What Transport layer protocol is this IP datagram carrying?

   
   

   		TCP
   		UDP
   		ICMP
   		IPv6

2 points  

Question 26

1. The figure below shows part of a captured Ethernet frame. What is the IP address of the sending host?

   
   

   		66.249.89.100
   		66.249.89.101
   		192.168.2.1
   		192.168.2.100

2 points  

Question 27

1. The figure below shows part of a captured Ethernet frame. What is the size of the entire IP datagram?
   

   
   

   		20 bytes
   		64 bytes
   		743 bytes
   		1500 bytes

2 points  

Question 28

1. The figure below shows part of a captured Ethernet frame. What is the size of the TCP header?
   

   		32 bytes
   		24 bytes
   		28 bytes
   		32 bytes

2 points  

Question 29

1. The figure below shows part of a captured Ethernet frame. What is the user application?

   
   

   		Telnet
   		HTTP
   		SMTP
   		Unknown

2 points  

Question 30

1. The figure below shows part of a captured Ethernet frame. What is the user application?
   

   		TFTP
   		DNS
   		SNMP
   		SMTP

2 points  

Question 31

1. The given figure shows a captured Ethernet frame on Wireshark Detailed window. Determine what is the size of IP header?
   

   		20 bytes
   		30 bytes
   		50 bytes
   		5 bytes

2 points  

Question 32

1. The given figure shows a captured Ethernet frame on Wireshark Detailed window. Determine what is the size of IP data?
   

   		112 bytes
   		0070 bytes
   		92 bytes
   		84 bytes

2 points  

Question 33

1. The maximum size of a TCP header is ____ bytes.

   		20
   		40
   		60
   		80

2 points  

Question 34

1. The size of a UDP header is

   		6 bytes
   		8 bytes
   		14 bytes
   		variable

2 points  

Question 35

1. The minimum size of an iP header is ____ bytes

   		16
   		20
   		32
   		64

2 points  

Question 36

1. From the wireshark captured window, identify the socket association for packet 4.

   
   

   		TCP, 192.168.0.2:1550  192.168.0.1:23
   		UDP, 192.168.0.2:1550  192.168.0.1:23
   		TCP, 192.168.0.1:1550  192.168.0.2:23
   		TCP, 192.168.0.1:23  192.168.0.2:1550

2 points  

Question 37

1. What is the basic unit of Ethernet traffic?

   		stream
   		segment
   		datagram
   		frame

2 points  

Question 38

1. What is the maximum length of an DIX Ethernet II frame (including header and trailer)?

   		518 bytes
   		1000 bytes
   		1500 bytes
   		1518 bytes

2 points  

Question 39

1. What is the metric cost for a packet to travel from Router Richmond to 10.2.3.0 network?
   

   		1
   		5
   		2
   		0

2 points  

Question 40

1. What is the size of a TCP port number?

   		8 bits
   		16 bits
   		32 bits
   		None of the above

2 points  

Question 41

1. What is the size of a ICMP header?

   		20
   		40
   		8
   		10

2 points  

Question 42

1. Which field in the IP header identify all the fragments belonging to the original unfragmented IP datagram?

   		ID
   		FLG
   		DF
   		MF

2 points  

Question 43

1. Which field in the IP header identify the last fragment of a fragmented IP datagram?

   		DF
   		MF
   		ID
   		Fragment Offset

2 points  

Question 44

1. Which of the following DOS command displays the routing table of a computer?

   		netstat -r
   		netstat -a
   		ipconfig
   		netstat - e

2 points  

Question 45

1. Which of the following application uses TCP as its transport protocol? (Choose two)

   		TFTP
   		FTP
   		HTTP
   		RPC

2 points  

Question 46

1. Which of the following is a characteristic of UDP? (Choose three)

   		Connectionless
   		Unreliable
   		Flow-control
   		Low overhead

2 points  

Question 47

1. Which of the following is a charateristic of TCP? (Choose three)

   		Stream Data Transfer
   		Reliability
   		Flow Control
   		Connectionless

2 points  

Question 48

1. Which of the following statement is FALSE regarding UDP header

   		The Length field is redundant
   		The Checksum field is optional
   		The length field is specified in term of number of 32-bit words
   		All of the above

2 points  

Question 49

1. Which one of the following shows the correct exchanges for establishing a TCP connection?

   
   

   		Figure A
   		Figure B
   		Figure C
   		Figure D

2 points  

Question 50

1. What is the minimum size of an IP datagram?

   		20 bytes
   		30 bytes
   		40 bytes
   		46 bytes