1. An address that identifies an application at the transport layer is:
ARP
IP
MAC
Port Address

Question 2. The Pv4 address range 169.254.0.0/16 is reserved for:
Link-Local addresses
Loopback addresses
Broadcast addresses
Addresses for self-identification

Question 3.The first four bits of the IPv4 addresses reserved for research are:
0000
1000
1110
1111

Question 4.  To determine how many digits are used for the network identifier in an IPv4 address, you must look at the:
subnet mask
binary mask
MAC mask
TCP/IP mask

Question 5. Which one of the following IPv4 addresses cannot be used as the destination address in an IPv4 packet?
12.0.0.0/8
12.0.0.1/8
12.5.5.5/8
12.255.255.254/8

Question 6. Number of addresses in the IPv4 address block 193.17.8.128/25 is:
25
256
128
none of the above

Question 7. 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

Question 8. Which one of the following subnets does the IPv4 address 154.180.0.58 255.255.255.248 belong to?
154.180.0.0/29
154.180.0.32/29
154.180.0.48/29
154.180.0.56/29

Question 9.One of the nodes in a broadcast domain is assigned the IPv4 address 152.165.113.126/21. Which one of the following IPv4 addresses cannot be assigned to any of the other nodes in the same broadcast domain?
152.165.115.254/21
192.168.118.160/21
192.168.111.253/21
192.168.117.158/21

Question 10.  What is the maximum number of subnets with 255.255.255.248 mask in a class C network?
5
8
32
64

Question 11.  The protocol used to map IP addresses to their physical addresses is:
IP Addressing
ARP
RARP
CIDR

Question 12. The IP header has a minimum length of:
5 bytes
15 bytes
20 bytes
none of the above

Question 13. The TTL keeps track of ____________ to decide whether a datagram is discarded.
Time
Message size
Fragments
Number of routers passed through

Question 14.All of the following apply to ICMP EXCEPT:
It is a Layer 3 protocol
It is a routable protocol
It compensates for IP's connectionless messaging drawback
It is independent of the IP header

Question 15. All of the following are ICMP error-reporting messages EXCEPT:
Protocol mismatch error
Destination unreachable
Source quench
Redirect

Question 16. The IANA defined three port categories. Which of the following is NOT a port category?
Static
Well-known
Registered
Dynamic

Question 17.  The following are advantages that TCP has over UDP EXCEPT:
It is more reliable than UDP
It provides acknowledgement information, UDP does not
It is faster than UDP
It guarantees delivery of datagrams, UDP does not

Question 18.TCP uses all of the following error detection methods EXCEPT:
FEC
Checksum
Acknowledgement
Time-out

Question 19.  Which of the following protocols uses TCP port 443?
HTML
HTTPS
TFTP
Telnet

Question 20. Which of the following protocols use both TCP and UDP?
FTP
SMTP
Telnet
DNS

Question 21.UDP is called a ________________transport protocol.
Connectionless, reliable
Connection-oriented, unreliable
Connectionless, unreliable
none of the above

Question 22.  Which of the following is considered a disadvantage of a client/server network? (Points : 5)
It is the least secure network architecture
It requires dedicated management staff
User accounts are managed locally on each network computer

Question 23.  Clients in Philadelphia area need to access content in a server located in the Boston area. The packets need to cross several hops to make it to the server. Which OSI layer governs the standards related to this requirement?
Application
Session
Transport
Network

Question 24.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

Question 25.  _______ encoding has a transition at the middle of each bit.
RZ
Manchester
Differential Manchester
all of the above

1. 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: 172.16.10.5 255.255.248.0

Question 2.  An IPv4 header bytes in Hex notation is given below: 45 c0 00 38 9b 3e 00 00 ff 01 fd 3b 80 99 90 01 80 99 91 56. Answer the following questions about the header: What is the size of data in the IPv4 datagram? What type of higher-level protocol is this datagram carrying? How many more hops can the datagram travel without being dropped? What are source and destination IP addresses for the IPv4 header?

Question 3 A router with IPv4 address 125.45.23.12 and the MAC address 23:45:AB:4F:67:CD has received a packet for a host destination with IP address 125.11.78.10. Show the entries in the ARP request packet sent by the router.

Question 4. A client sends 1024 bytes of data to a server using TCP protocol. 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.