I'm getting closer to taking the ICND1 exam and have been using Cisco's site to do some practice tests. I came across the following two which are somewhat strange to me, in that the answers they give don't match what I have learned.
Which two of these addresses are private IP addresses? (Choose two.) (Understanding TCP/IP's Internet Layer)
1. 10.215.34.124
2. 127.16.71.43
3. 172.17.10.10
4. 225.200.15.10
They say 2 and 3 are private and the correct answers, but isn't answer 1 also correct? I am under the assumption about the following private IP ranges:
10.0.0.0/8
172.16.0.0/12
192.168.0.0/16
I know 127.0.0.0 is a reserved address, so wouldn't that fall under a different category than private addresses? Weird question in my eyes and I pray the ambiguity on the real test isn't the same. Onto question 2...
45. Which statement about an Ethernet address is accurate? (Source: Understanding Ethernet)
1. The address used in an Ethernet LAN directs data to the proper receiving location.
2. The source address is the 4-byte hexadecimal address of the NIC on the computer that is generating the data packet.
3. The destination address is the 8-byte hexadecimal address of the NIC on the LAN to which a data packet is being sent.
4. Both the destination address and source addresses consist of an 8-byte hexadecimal number.
I said 1. They said 4. I can see 1 maybe not being 100% accurate, but can their answer of number 4 be right? MAC addresses, 48 bits, correct (for the love of god and all my time spent studying, I hope that's right!). 8 bits in a byte. MAC address = 6 bytes. Why, oh why would Cisco's own site do this to someone?!
