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. Adds a permanent static ARP entry for an Ethernet host
Duplicate address checks; Advertise new data-link identifiers; Update the ARP caches of hosts
LIRs
Loose source routing; Strict source routing; Record route; Timestamp
Router(config)#arp {ip-address} {mac-address} arpa

2. What routing protocols are classful?
255.255.255.224
0
RIPv1 and IGRP
Time Exceeded

3. What is the maximum length of an IPv4 header?
127.0.0.0/8
60 octets
Router(config)#ip arp proxy disable
Sequence Number

4. What is TCP?
Don't Fragment
Length of header in words (32-bit)
Each router decrements the TTL
Transmission Control Protocol

5. What is ICMP Type 11?
Sequence Numbers
Time Exceeded
Router(config-if)#no ip redirects
255.255.255.240

6. What are the steps to subnet an IPv4 address?
2
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
IANA
Internet Corporation for Assigned Network Numbers

7. Who allocates IP address space and AS numbers to RIRs?
60 octets
0.0.0.0/8
IANA
IPv4 and IPv6

8. What is the IPv4 Protocol number for GRE?
Congestion Window Reduced
47
Router(config-if)#no ip redirects
IP Precedence (3-bit); ToS (4-bit); Reserved (1-bit)

9. What is ICMP Type 5?
Socket
Minimize Delay (1-bit); Maximise Throughput (1-bit); Maximise Reliability (1-bit); Minimize Monetary Cost (1-bit)
The next sequence number that the source expects to receive from the destination
Redirect

10. What is NIR?
Internet Protocol
National Internet Registry
An ARP request issued by a host with its own IPv4 address as the target address
Used by IRDP on some operating systems to discover local routers

11. Which IPv4 address range is reserved for link-local addresses when DHCP fails?
169.254.0.0/16
Internet Service Provider
RIPv1 and IGRP
Regional Internet Registry

12. What is the ARP Hardware address length value for Ethernet?
6
Number of octets to be added to the Sequence Number to indicate the end of the urgent data
Router(config)#arp {ip-address} {mac-address} arpa
Class A 0; Class B 10; Class C 110; Class D 1110; Class E 1111

13. What is the ARP Operation value for an ARP Reply?
Method where routers - by responding to ARP requests for IP addresses in different subnets - make themselves available to hosts with no default gateway configured
Destination Unreachable
2
1-2 Network interface; 3 Internet; 4 Host-to-host; 5-7 Application

14. Which IPv4 address range is reserved for self-identification on a local subnet?
Internet Service Provider
Both the TCP header and the encapsulated data
RIRs
0.0.0.0/8

15. What is the ARP Protocol address length value for IPv4?
0 Routine; 1 Priority; 2 Immediate; 3 Flash; 4 Flash Override; 5 Critical; 6 Internetwork Control; 7 Network Control
4
Don't Fragment
RIRs

16. What is the content of the the Urgent Pointer field in the TCP header?
Electrical/Optical - Mechanical - Functional and Procedural
127.0.0.0/8
Number of octets to be added to the Sequence Number to indicate the end of the urgent data
Padding of zeros to ensure that the header ends on a 32-bit boundary

17. What is the IPv4 Protocol number for OSPF?
255.255.255.248
89
20 octets
60 octets

18. What is the content of the TCP Window Size field?
198.18.0.0/15
Identifier; Flags and Fragmentation Offset
Offset - in units of eight octets - from the beginning of the original header to the beginning of the fragment
Number of octets - starting with the octet indicated by the Acknowledgement Number - that the receiver will accept from the sender before the sender must stop transmitting and wait for a new Acknowledgement

19. Which protocol has mostly replaced Reverse ARP?
Regional Internet Registry
DHCP
1
6

20. Who is responsible for maintaining the official assignments of TCP and UDP port numbers for specific uses?
Used by a host to obtain the IPv4 address associated with its own MAC address
An ARP request issued by a host with its own IPv4 address as the target address
They are the same byte - but the names and value interpretations are different
IANA

21. What is the formula to calculate the next Sequence Number based on the Sequence Number of the current TCP segment?
Acknowledgements - checksums and timers
Sequence Number + Data payload octets + 1
Open Systems Interconnection
4

22. What is RST?
Router Selection
Internet Control Message Protocol
RFC 3330
Reset

23. What is the ARP Operation value for an Inverse ARP Request?
8
IANA
64
192.88.99.0/24

24. What is added after the option field in the IPv4 header?
Used by a host to obtain the IPv4 address associated with its own MAC address
RFC 791
Padding of zeros to ensure that the header ends on a 32-bit boundary
6

25. What is URG?
Urgent
IANA
LIRs
Acknowledgement

26. Who are LIRs?
Used by routers to notify hosts of another router on the data link that should be used for a particular destination
LIRs
Mostly large ISPs - enterprises - or academic institutions
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. Who administers and registers public IP address space and AS numbers within a country or economic unit?
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
Used by IRDP on some operating systems to discover local routers
3
NIRs

28. What is IP?
Congestion Window Reduced
Per-Hop Behaviour (PHB)
DHCP
Internet Protocol

29. What is the format of an ICMP header?
Type (8-bit); Code (8-bit); Checksum (16-bit); Variable fields
Duplicate address checks; Advertise new data-link identifiers; Update the ARP caches of hosts
Reserved (1-bit); DF (1-bit); MF (1-bit)
DSCP (6-bit); ECN (2-bit)

30. What is PSH?
Used by routers to notify hosts of another router on the data link that should be used for a particular destination
Router Advertisement
Protocols that include subnet masks in their routing updates
Push

31. What TCP/IP protocol suite layer corresponds to the physical and data link layers of the OSI model?
Network interface
Padding of zeros to ensure that the header ends on a 32-bit boundary
0
4

32. What is LIR?
Host-to-host
Address Resolution Protocol
Local Internet Registry
Reserved (1-bit); DF (1-bit); MF (1-bit)

33. What is Inverse ARP?

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

34. What is the function of ICMP redirect messages?
Used by routers to notify hosts of another router on the data link that should be used for a particular destination
An ARP request issued by a host with its own IPv4 address as the target address
RFC 791
Time to Live

35. Enables debugging output for ARP transactions
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
Reset
Subtract Header Length field from Total Length field
Router#debug arp

36. What is the IPv4 Protocol number for EIGRP?
They are the same byte - but the names and value interpretations are different
88
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
Internet Protocol

37. What is SYN?
Synchronize
1
20 octets
Used by IRDP on some operating systems to discover local routers

38. What is a TCP port number of an application called when it is coupled with the IP address of the server?
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
DSCP (6-bit); ECN (2-bit)
RFC 791
Socket

39. What is covered by the TCP Checksum field?
Used by a host to obtain the IP address associated with another host's MAC address
Push
Both the TCP header and the encapsulated data
Acknowledgement

40. What is the value of the TCP Reserved field?
Socket
The next sequence number that the source expects to receive from the destination
0
Class A 1-126; Class B 128-191; Class C 192-223; Class D 224-239; Class E 240-254

41. Which RFC defines the special use IPv4 address ranges?
4
RFC 3330
Transmission Control Protocol
Internet Service Provider

42. What is the first octet rule for IPv4 address classes in decimal?
IANA
Internet Service Provider
Class A 1-126; Class B 128-191; Class C 192-223; Class D 224-239; Class E 240-254
Address Resolution Protocol

43. What are the uses of gratuitous ARP?
They are the same byte - but the names and value interpretations are different
Sequence Number + Data payload octets + 1
Duplicate address checks; Advertise new data-link identifiers; Update the ARP caches of hosts
255.255.255.128

44. What is ARP?
Sequence Numbers
0
Address Resolution Protocol
4

45. What is the format of the ToS field?
Minimize Delay (1-bit); Maximise Throughput (1-bit); Maximise Reliability (1-bit); Minimize Monetary Cost (1-bit)
Type (8-bit); Code (8-bit); Checksum (16-bit); Variable fields
Network interface
Identifier; Flags and Fragmentation Offset

46. What is the format of the Flags field in the TCP header?
CWR (1-bit); ECE (1-bit); URG (1-bit); ACK (1-bit); PSH (1-bit); RST (1-bit); SYN (1-bit); FIN (1-bit)
255.255.255.240
Class A 0; Class B 10; Class C 110; Class D 1110; Class E 1111
More Fragments follow

47. What are the most common IP version numbers?
Router(config-if)#no ip redirects
Echo
1
IPv4 and IPv6

48. What is the IPv4 Protocol number of RSVP?
Echo
IANA
46
Local Internet Registry

49. What is the ARP Operation value for a Reverse ARP Reply?
Length of header in words (32-bit)
Host-to-host
4
IANA

50. What is the format of the DiffServ byte?
Time to Live
More Fragments follow
Loose source routing; Strict source routing; Record route; Timestamp
DSCP (6-bit); ECN (2-bit)