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Question on CCNA Prep Center questions
jezg76
Member Posts: 97 ■■□□□□□□□□
in CCNA & CCENT
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?!
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?!
policy-map type inspect TACO
class type inspect BELL
drop log
class type inspect BELL
drop log
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OptionsNetstudent
Member Posts: 1,693 ■■■□□□□□□□
You will find some inconsistencies in all practice tests everywhere you go. You just have to ask questions when you aren't sure and pick out the bad questions.
As per your questions, yes 127.0.0.0 is reserved. It is not considered a private internet address from RFC1918.
Private range is:
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
Also 48 bits = 6bytes. So I see answer 1 as the only option.There is no place like 127.0.0.1 BUT 209.62.5.3 is my 127.0.0.1 away from 127.0.0.1!