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1. (TCO 6) Show the subnet address, subnet mask in slash notation, broadcast address, number of addresses, first valid host address, and the last valid host address for the subnet address of the host with IP v4 address: 102.183.7.15 255.240.0.0
2. (TCO6) An IPv4 header bytes in Hex notation is given below: 45 00 05 dc fd 2b 20 00 80 11 95 ca c0 a8 00 64 c0 a8 00 66. Answer the following questions about the header: Are options being used? What type of higher-level protocol is this datagram carrying? Is there a fragmentation? If yes, is this a first, last, or middle fragment? What are source and destination IP addresses for the IPv4 header?
3.(TCO 7) A host with an IP address 125.11.78.10 and a MAC address AA:BB:A2:4F:67:CD has received an ARP request from a router with IPv4 address 125.45.23.12 and the MAC address 23:45:AB:4F:67:CD. Show the ARP reply packet entries the host sends to the router.
4. (TCO 7) A TCP client sends 64 bytes of data to a TCP server. Calculate the efficiency of this transmission at the TCP level (ratio of data excluding header to the total bytes transmitted). Calculate the efficiency of transmission at the IP level. Assume no options for the header and no errors. Calculate the efficiency of transmission at the data link layer. Assume no options for IP header and Ethernet-II format are used at the data link layer.
5.(TCO 2) Given the following encoded signal form (The space between two vertical dashed lines indicates one bit-time), what is the data represented by the signal if the waveform uses the following encoding rule: “A 0 is represented with a low-to-high transition in the center of the bit, and a 1 is represented with a high-to-low transition in the center of the bit”
6.(TCO 4) A system uses the Selective Repeat protocol with a window size of 4. If each packet carries 1000 bits of data, how long does it take to send 1 million bits of data if the distance between the sender and receiver is 5000 Km and the propagation speed of the signal is 2x10^8 meters per second? Ignore transmission, waiting, and processing delays. Assume no errors in the link.
7.TCO 2) You are given three channels A, B, and C with Bit Error Rates 10-6 , 10-5 , and 10-9 respectively. Which channel is best? And what is the number of errors that you will likely see on that channel when you transmit a one mega-bit file?
8.(TCO 3) An asynchronous link transmits at 2400 bits per second. If the clock in the receiver is running 2% slow, how many bits are received correctly before an error occurs due to loss of synchronization? Assume that both the transmitter and receiver clocks start at the same time.
9.(TCO 6) For the following network of routers, switches, and hosts, come up with an efficient address assignment scheme that assigns IPv4 addresses for each network layer interface in the network from IPv4 address range 10.16.5.0/24. How many addresses are still left over for future assignment?
See figure below
10.(TCO 6) The first four bits of the IPv4 addresses reserved for research are:
0000
1000
1110
1111
11.(TCO 6) The identifier that is formed by setting the host portion of an IPv4 address to all binary ones is known as:
Reserved address
Subnetwork address
Multicast address
Broadcast address
12.(TCO 6) Which one of the following IPv4 addresses can either be used as source or destination address in an IPv4 packet?
12.0.0.1/8
12.55.55.55/8
12.255.255.255/8
none of the above
13. (TCO 6) Number of addresses in the IPv4 address block 193.17.8.128/25 is:
25
256
128
none of the above
14.(TCO 6) The subnet mask for the address block 163.248.248.0/21 is:
255.0.0.0
255.255.0.0
255.255.248.0
255.255.255.21
15. (TCO 6) Which one of the following subnets does the IPv4 address 114.138.20.58 255.255.224.0 belong to:
114.138.0.0/19
114.138.20.0/19
114.138.16.0/19
114.138.32.0/19
16. (TCO 6) One of the nodes in a broadcast domain is assigned the IPv4 address 192.168.119.147/28. Which one of the following IPv4 addresses can be assigned to one of the other nodes in the same broadcast domain:
192.168.119.161/28
192.168.119.160/28
192.168.119.159/28
192.168.119.158/28
17.(TCO 6) What is the maximum number of subnets with 255.255.255.248 mask in a class C network?
5
8
32
64
18.(TCO 6) The protocol used to map IP addresses to their physical addresses is:
IP Addressing
ARP
RARP
CIDR
19. (TCO 6) The IP header has a minimum length of:
5 bytes
15 bytes
20 bytes
none of the above
20. (TCO 6) The IP performs the following EXCEPT:
Packet fragmentation
Logical addressing
Hardware addressing
Packet routing
21. (TCO 7) ICMP can be used to do all of the following EXCEPT:
Determine round-trip delay time between endpoints
Determine which subnet to which a specific host is assigned
Discover the existence of neighboring routers
Determine how many hosts are connected in a subnet
22.. (TCO 7) All of the following are ICMP error-reporting messages EXCEPT:
Protocol mismatch error
Destination unreachable
Source quench
Redirect
23. (TCO 7) The application that would depend on port 80 being included in a transport layer protocol is most likely:
E-mail
ftp
Web browser
Telnet
24. (TCO 7) The three primary services provided by TCP to the application layer include all EXCEPT:
Stream delivery
Buffering
Segmentation
IP translation
25. (TCO 7) The TCP service that accounts for differing data rates between the source
and destination is:
Stream delivery
Buffering
Synchronization
Segmentation
26. (TCO 7) Which of the following popular applications are correctly associated with their well known port numbers and transport protocol?
SNMP, 161, TCP
Telnet, 23, TCP
FTP, 110, TCP
TFTP, 53, TCP
27. (TCO 6) You ping 127.0.0.1 and it gives an error. What is the problem?
Bad NIC Card
TCP/IP needs to be reloaded
Bad router connection
Bad subnet mask
28. (TCO 7) UDP does not add anything to the services of IP except for providing _______ communication.
Node-to-node
Process-to-process
Host-to-host
none of the above
29. (TCO 1) Which of the following is considered a disadvantage of a client/server network?
It is difficult to manage data storage and backups
It is the least secure network architecture
It requires dedicated management staff
User accounts are managed locally on each network computer
30. (TCO 3) The source file is encoded in 7-bit ASCII code and the destination expects the file to be in EBCDIC code. Which OSI layer takes care of this conversion?
Transport layer
Session Layer
Presentation Layer
Application Layer
31. (TOC 4) Which of the following could not be an Ethernet source address?
8A-7B-6C-DE-10-00
8B-32-21-21-4D-34
EE-AA-C1-23-45-32
46-56-21-1A-DE-F4
32. (TCO 5) _______ encoding has a transition at the middle of each bit.
RZ
Manchester
Differential Manchester
all of the above
10.(TCO 6) The first four bits of the IPv4 addresses reserved for research are:
Explanation / Answer
Multiple Questions : Answering 6 questions
10 . 1111
11. Subnetwork address
18. ARP
19. 5 bytes
20. Hardware addressing
32. all of the above
Please post rest of the question as a new question.
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