Test your basic knowledge |

IPV4 Addressing

Subject : it-skills

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What is IP?
Internet Control Message Protocol
Duplicate address checks; Advertise new data-link identifiers; Update the ARP caches of hosts
Internet Protocol
Acknowledgement

2. What is the content of the Maximum Segment Size (MSS) in the Option field of the TCP header?
Version (4-bit); Header Length (4-bit); ToS (8-bit); Total Length (16-bit); Identifier (16-bit); Flags (3-bit); Fragment Offset (13-bit); TTL (8-bit); Protocol (8-bit); Header Checksum (16-bit); Source Address (32-bit); Destination Address (32-bit);
Number of octets to be added to the Sequence Number to indicate the end of the urgent data
Mostly large ISPs - enterprises - or academic institutions
Largest segment size that the sender is willing to accept

3. What is the prerequisite for using the Urgent Pointer field in the TCP header?
IPv4 and IPv6
URG flag set
Length of header in words (32-bit)
Internet Corporation for Assigned Network Numbers

4. What is PSH?
0
Push
Regional Internet Registry
4

5. Which IPv4 address range is reserved for use in documentation and example code?
192.0.2.0/24
17
64
255.255.255.192

6. Adds a permanent static ARP entry for an Ethernet host
IP Precedence (3-bit); ToS (4-bit); Reserved (1-bit)
RFC 1918
Router(config)#arp {ip-address} {mac-address} arpa
47

7. What is the ARP Protocol type value for IPv4?
Open Systems Interconnection
0x0800
Host-to-host
Version (4-bit); Header Length (4-bit); ToS (8-bit); Total Length (16-bit); Identifier (16-bit); Flags (3-bit); Fragment Offset (13-bit); TTL (8-bit); Protocol (8-bit); Header Checksum (16-bit); Source Address (32-bit); Destination Address (32-bit);

8. Disables proxy ARP on all interfaces
Used by a host to obtain the IPv4 address associated with its own MAC address
60 octets
Router(config)#ip arp proxy disable
Hardware type (16-bit); Protocol type (16-bit); Hardware address length (8-bit); Protocol address length (8-bit); Operation (16-bit); Sender hardware address; Sender protocol address; Target hardware address; Target protocol address

9. What is the ARP Protocol address length value for IPv4?
Don't Fragment
Redirect
4
0.0.0.0/8

10. What is the IPv4 Protocol number for ICMP?
Router(config)#arp {ip-address} {mac-address} arpa
ICMP Router Discovery Protocol
1 Determine how many subnets are required; 2 Determine how many hosts per subnet are required; 3 Determine the subnet mask for each subnet; 4 Calculate the network address for each subnet
1

11. What is Inverse ARP?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

12. What is prefix /28 in decimal notation?
The next sequence number that the source expects to receive from the destination
Hardware type (16-bit); Protocol type (16-bit); Hardware address length (8-bit); Protocol address length (8-bit); Operation (16-bit); Sender hardware address; Sender protocol address; Target hardware address; Target protocol address
255.255.255.240
Internet Protocol

13. What is RIR?
1
Socket
RIPv1 and IGRP
Regional Internet Registry

14. What is ICMP Type 5?
Redirect
IPv4 and IPv6
Used by a host to obtain the IPv4 address associated with its own MAC address
Echo Reply

15. Who administers and registers public IP address space and AS numbers within a country or economic unit?
IANA
NIRs
1
4

16. What is the other name for the TCP Header Length field?
The next sequence number that the source expects to receive from the destination
2
Data Offset
Protocols that don't include subnet masks in their routing updates

17. What is ISP?
255.255.255.252
Electrical/Optical - Mechanical - Functional and Procedural
Internet Service Provider
Router(config-if)#no ip proxy-arp

18. What is ICMP Type 9?
0
Router(config)#ip netmask-format {bit-count | decimal | hexadecimal}
9
Router Advertisement

19. What is covered by the TCP Checksum field?
192.88.99.0/24
Both the TCP header and the encapsulated data
Open Systems Interconnection
Loose source routing; Strict source routing; Record route; Timestamp

20. Which IPv4 address range is reserved for self-identification on a local subnet?
Used by a host to obtain the IP address associated with another host's MAC address
0.0.0.0/8
1 Determine how many subnets are required; 2 Determine how many hosts per subnet are required; 3 Determine the subnet mask for each subnet; 4 Calculate the network address for each subnet
Source Port (16-bit); Destination Port (16-bit); Sequence Number (32-bit); Acknowledgement Number (32-bit); Header Length (4-bit); Reserved (4-bit); Flags (8-bit); Windows Size (16-bit); Checksum (16-bit); Urgent Pointer (16-bit); Options; Padding

21. What is the ARP Operation value for a Reverse ARP Reply?
Used by a host to obtain the IP address associated with another host's MAC address
LIRs
4
Reset

22. What mechanism is used by TCP to regulate the flow of segments?
Length of header in words (32-bit)
DSCP (6-bit); ECN (2-bit)
255.255.255.224
Windowing

23. What is the ARP Operation value for an Inverse ARP Reply?
More Fragments follow
4
9
0 Routine; 1 Priority; 2 Immediate; 3 Flash; 4 Flash Override; 5 Critical; 6 Internetwork Control; 7 Network Control

24. What is the minimum length of an IPv4 header?
4
Application
Offset - in units of eight octets - from the beginning of the original header to the beginning of the fragment
20 octets

25. Which protocol has mostly replaced Reverse ARP?
Class A 1-126; Class B 128-191; Class C 192-223; Class D 224-239; Class E 240-254
4
Class A 0; Class B 10; Class C 110; Class D 1110; Class E 1111
DHCP

26. What is the format of the Flags field in the TCP header?
0.0.0.0/8
Number of octets to be added to the Sequence Number to indicate the end of the urgent data
Router Selection
CWR (1-bit); ECE (1-bit); URG (1-bit); ACK (1-bit); PSH (1-bit); RST (1-bit); SYN (1-bit); FIN (1-bit)

27. What is the most commonly used Option field in the TCP header?
Each router decrements the TTL
More Fragments follow
URG flag set
Maximum Segment Size (MSS)

28. What is the name of the queuing and forwarding of IP packets based on DiffServ?
Router#debug arp
RIRs
Per-Hop Behaviour (PHB)
Version (4-bit); Header Length (4-bit); ToS (8-bit); Total Length (16-bit); Identifier (16-bit); Flags (3-bit); Fragment Offset (13-bit); TTL (8-bit); Protocol (8-bit); Header Checksum (16-bit); Source Address (32-bit); Destination Address (32-bit);

29. What is the DF-bit in the IPv4 header?

Warning: Invalid argument supplied for foreach() in /var/www/html/basicversity.com/show_quiz.php on line 183

30. Why must the header checksum of an IPv4 packet be recalculated at every router?
Type (8-bit); Code (8-bit); Checksum (16-bit); Variable fields
Echo
NIRs
Each router decrements the TTL

31. What is ICMP Type 10?
Socket
4
Router Selection
Router(config-if)#arp timeout {seconds}

32. Which RFC defines the private IPv4 address ranges?
Transmission Control Protocol
RFC 1918
URG flag set
ICANN and IANA

33. What are the most frequently used options in the IPv4 header?
4
Maximum Segment Size (MSS)
Loose source routing; Strict source routing; Record route; Timestamp
Number of octets to be added to the Sequence Number to indicate the end of the urgent data

34. Who assigns IP address space to its own customers?
ICANN
LIRs
Type (8-bit); Code (8-bit); Checksum (16-bit); Variable fields
Largest segment size that the sender is willing to accept

35. What is the recommended default TTL?
Host-to-host
64
Uniquely identify every application in the network
Echo

36. How can the receiver determine the size of a packet's data payload based on the IPv4 header?
Don't Fragment
Subtract Header Length field from Total Length field
3
Time to Live

37. Displays the ARP cache of a router
Time to Live
Final
60 octets
Router#show arp

38. What TCP/IP protocol suite layer corresponds to the transport layer of the OSI model?
Local Internet Registry
An ARP request issued by a host with its own IPv4 address as the target address
Host-to-host
3

39. What is the IPv4 Protocol number for GRE?
47
4
Destination Unreachable
Router(config)#ip arp proxy disable

40. What is Reverse ARP?
Internet
Router#show arp
Used by a host to obtain the IPv4 address associated with its own MAC address
Identifier; Flags and Fragmentation Offset

41. What is the first octet rule for IPv4 address classes in decimal?
IANA
Class A 1-126; Class B 128-191; Class C 192-223; Class D 224-239; Class E 240-254
46
47

42. What TCP/IP protocol suite layer corresponds to the network layer of the OSI model?
Number of octets to be added to the Sequence Number to indicate the end of the urgent data
Protocols that include subnet masks in their routing updates
Internet
URG flag set

43. What is ECE?
1-2 Network interface; 3 Internet; 4 Host-to-host; 5-7 Application
3
ECN-Echo
Source Port (16-bit); Destination Port (16-bit); Sequence Number (32-bit); Acknowledgement Number (32-bit); Header Length (4-bit); Reserved (4-bit); Flags (8-bit); Windows Size (16-bit); Checksum (16-bit); Urgent Pointer (16-bit); Options; Padding

44. What is the IPv4 Protocol number for OSPF?
Application
89
Open Systems Interconnection
Internet Corporation for Assigned Network Numbers

45. What is the IPv4 protocol number for UDP?
Router Selection
17
ICANN
Reserved (1-bit); DF (1-bit); MF (1-bit)

46. Who administers and registers IP address space and AS numbers within a region?
RIRs
Router Advertisement
3
IP Precedence (3-bit); ToS (4-bit); Reserved (1-bit)

47. What is the purpose of a socket?
Urgent
Source Port (16-bit); Destination Port (16-bit); UDP Length (16-bit); Checksum (16-bit)
Uniquely identify every application in the network
ICMP Router Discovery Protocol

48. What are the private IPv4 address ranges?
10.0.0.0/8; 172.16.0.0/12; 192.168.0.0/16
Transmission Control Protocol
Router(config-if)#arp timeout {seconds}
127.0.0.0/8

49. Which IPv4 address range is reserved for benchmark testing of Internet devices (RFC 2544)?
255.255.255.248
ECN-Echo
Used by a host to obtain the IPv4 address associated with its own MAC address
198.18.0.0/15

50. What is the format of a UDP header?
An ARP request issued by a host with its own IPv4 address as the target address
Source Port (16-bit); Destination Port (16-bit); UDP Length (16-bit); Checksum (16-bit)
17
Version (4-bit); Header Length (4-bit); ToS (8-bit); Total Length (16-bit); Identifier (16-bit); Flags (3-bit); Fragment Offset (13-bit); TTL (8-bit); Protocol (8-bit); Header Checksum (16-bit); Source Address (32-bit); Destination Address (32-bit);