CCNA IP Addressing Answers

1. Static address (Assigned by an administrator), Dynamic address (assigned by DHCP/BOOTP Server) & Link local address (APIPA) 
2.  Initially IANA (Internet Assigned Numbers Authority) replaced by ICANN (Internet Corporation for Assigned Names and Numbers), in the year 1998.
3. IP address - RFC1166; CIDR - RFC4632; Supernetting - RFC1338 
4. D – 255.255.255.252 
5. 10.0.0.0/8, 172.16.0.0/16 to 172.31.0.0/16, 192.168.0.0/24 to 192.168.255.0/24 
6. 1022 
7. DAD (Duplicate Address Detection) 
8. Prefix = Number of net bits , Suffix-Number of host bits  
9. Automatic private IP addressing (APIPA) is a feature mainly found in Microsoft operating systems. APIPA enables clients to still communicate with other computers on the same network segment until an IP address can be obtained from a DHCP server, allowing the machine to fully participate in the network. The range of these IP address is 169.254.0.1 to 169.254.255.254 with a default Class B subnet mask of 255.255.0.0. Optimal use of IP addresses based on number of hosts in a network thereby reducing IP wastage.
10. Optimal use of IP addresses based on number of hosts in a network thereby reducing IP wastage.
11. Reduces the size of the routing table (By combining the contiguous networks), Provides IP address blocks as per customer requirements. (VLSM)
12. 2^17
13. 172.16.32.191
14. 62
15.  172.16.16.1 through 172.16.19.254
16. 172.27.16.64
17. Broadcast Address: 10.28.127.255 and Subnet ID: 10.28.64.0
18. SNM: 255.255.252.0 and Last Subnet Address: 172.16.252.0
19. It will not allow the use of 1st subnet address.
20. 172.27.220.1 through 172.27.21.254
21. 172.31.9.127
22. 172.22.95.128
23. 172.23.55.129 through 172.23.55.190
24. 10.95.64.1, 10.95.127.254 and 10.95.127.255
25. 172.30.183.255
26. 192.168.28.128
27. 192.168.238.94
28. 172.18.115.255
29. 172.19.124.1 through 172.19.127.254
30. 172.24.192.0
31. 172.20.212.0
32. 192.122.63.17 through 192.122.63.30
33. 192.19.191.225 through to 192.19.191.254
34. 171.23.15.255
35. 172.21.94.1 through 172.21.95.254
36. 4096 subnets and 4094 hosts
37. 172.28.3.254
38. 8 subnets and 30 hosts
39. 172.229.128.1 through 172.229.143.254
40. 194.166.72.223

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CCNA Network Essentials Answers

1.     48 bits and represented by 6pairs of hexadecimal digits.

2.     RJ-45

3.     Unshielded Twisted Pair

4.     Star

5.     One, 12

6.     Application, Presentation, Session, Transport, Network, Datalink, Physical

7.     Application layer

8.     Transport – Segment, Network – Packet / Datagram, Datalink – Frame, Physical – Bit

9.     Layer 3, Network layer

10.  Connection-oriented eg. TCP is a connection-oriented protocol that uses acknowledgement (overhead)

11.  Modem

12.  DNS

13.  0 to 1023

14.  LLC (logical link control) & MAC (media access control)

15.  ARP

16.  Physical Layer

17.  Data Link layer

18.  Physical Layer

19.  Data link layer

20.  Presentation layer

21.  Internet Control Message Protocol, a network layer protocol used by network devices to send error notification

22.  UDP

23.  ICMP echo request & echo reply. PING - Packet Internet Groper

24.  Ethernet with maximum transfer rate of 100 Mbps, uses baseband signalling and Twisted pair cabling

25.  FTP uses TCP & TFTP uses UDP. Authentication is mandatory in FTP, not in TFTP

26.  TCP: Connection oriented protocol, Reliable (uses acknowledgement), supports error correction, comparatively slow.

UDP: Connection less protocol, Unreliable (no acknowledgement), supports error detection, faster than TCP

27.  DNS - 53 ; Telnet - 23 ; SMTP – 25 ; POP3 - 110

28.  FTP Data channel Port no : 21, Control channel : 20

29.  CSMA/CD

30.  Optic Fibre

31.  Leased Line

32.  Core, Distribution & Access

33.  Any packet switched (or Cell Switched) PVC eg. X.25, Frame Relay, ATM

34.  DTE – Data Terminal Equipment ; DCE – Data Circuit Terminating Equipment

35.  CSU/DSU – Channel Service Unit / Data Service Unit (or Digital Service Unit)