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Which network is reserved as a private network according to RFC1918?
Suggested Answer: C
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In an Ethernet frame carrying a VLAN tag, the VLAN tag appears before the type field. A VLAN tag is a 4-byte field that is inserted into an Ethernet frame to indicate the VLAN membership and priority of the frame. The VLAN tag consists of two subfields: the tag protocol identifier (TPID) and the tag control information (TCI). The TPID subfield is a 16-bit field that identifies the frame as an IEEE 802.1Q-tagged frame, with a value of 0x8100. The TCI subfield is a 16-bit field that contains the priority code point (PCP), the drop eligible indicator (DEI), and the VLAN identifier (VID). The VLAN tag appears between the source MAC address and the type fields of the original frame, shifting the type field by four bytes. The type field indicates the type of the payload, such as IP or ARP .
42 comments · newest first
DO
Dorethea
10 months ago
Surprised to see 172.15.1.0/24 listed here, that's public!
RU
Rutha
11 months ago
193.168.1.0/24? That's not even a private range!
SE
Serina
11 months ago
Wait, isn't 10.0.0.0/8 also private?
LA
Lashandra
11 months ago
I agree, that's the right range.
RU
Ruthann
11 months ago
Definitely 172.16.1.0/9 is private!
AN
Anna
12 months ago
I feel like the answer has to be one of the 172.x options, but I can't recall if it's 172.16.1.0 or something else.
BO
Bo
12 months ago
I’m a bit confused; I thought 193.168.1.0 was a private network, but it seems like it’s not in RFC1918.
LA
Lawanda
12 months ago
I remember practicing a question about private IP ranges, and I think 172.16.1.0/9 is part of that range.
QU
Quiana
1 year ago
I think the private networks are 10.x, 172.16.x, and 192.168.x ranges, but I’m not sure which one is specifically mentioned in RFC1918.
SH
Shawna
1 year ago
I'm confident the answer is C. 193.168.1.0/24 is not a valid private network range according to RFC1918.
RE
Reynalda
1 year ago
This seems straightforward - the 172.16.1.0/9 range is one of the private network blocks defined in RFC1918, so I'll go with that.
NA
Nada
1 year ago
I'm a bit unsure on this one. I'll need to review my notes on RFC1918 to make sure I have the right private network range.
LE
Leota
1 year ago
Okay, I know RFC1918 defines the private IP address ranges, so I just need to identify which one of these options matches that.
FA
Fausto
1 year ago
Hmm, this looks like a tricky one. I'll need to think through the RFC1918 guidelines carefully to determine the correct private network.
LI
Ligia
1 year ago
Okay, I think I've got this. The key is finding the two things that internal controls need to balance. Based on the answer choices, it looks like it's a choice between risk, control, productivity, and test. I'll go with the most logical pairing.
AL
Aleisha
1 year ago
Okay, I've got a strategy here. I'll think about the different factors that could affect the application's load, like the number of users and their average usage.
BR
Brice
1 year ago
Hmm, I'm a bit unsure about this one. I'll need to think carefully about the relationship between quality objectives and the different options provided.
YU
Yuki
1 year ago
Ah, this is a tricky one. I'm torn between data encryption and data control. I'll have to weigh the relative importance of those two requirements to businesses. Time to put on my critical thinking cap!
ME
Melissa
1 year ago
Ah, the age-old question: 'Which network is reserved as a private network?' It's like asking 'What's the meaning of life?' - the answer is always 42, right?
AR
Aretha
1 year ago
No problem, happy to help!
LA
Lai
1 year ago
Oh, I see! Thanks for the info.
MY
Myra
1 year ago
B) 10.254.1.0/24 is reserved as a private network according to RFC1918.
EL
Elly
1 year ago
D) 172.15.1.0/24
CH
Christoper
1 year ago
C) 193.168.1.0/24
SO
Sophia
1 year ago
B) 10.254.1.0/24
KE
Kenneth
1 year ago
A) 172.16.1.0/9
BR
Brice
1 year ago
I bet the correct answer is D) 172.15.1.0/24. Why? Because it's the only one that doesn't sound like a valid IP address. The exam writers are tricky like that.
AR
Arlene
1 year ago
C) Yeah, C) 193.168.1.0/24 is definitely not a private network. Stick to the standards!
BA
Barbra
1 year ago
B) I see what you mean, but B) 10.254.1.0/24 is the correct one according to RFC1918.
VI
Vi
1 year ago
D) Thanks for the tip, I'll remember that for next time.
JU
Junita
1 year ago
A) 172.16.1.0/9 is actually the correct answer. It falls within the range of private IP addresses.
AF
Afton
1 year ago
C) Yeah, it's important to pay attention to the details in these questions.
SH
Sherita
1 year ago
B) I thought it was D) 172.15.1.0/24 too, but I guess not.
ST
Stephaine
1 year ago
A) 172.16.1.0/9 is actually the correct answer.
TY
Tyra
1 year ago
I'm stumped on this one. Maybe I should've paid more attention in my networking class instead of doodling unicorns all day.
BE
Beata
1 year ago
I'm pretty sure it's A) 172.16.1.0/9. That range is specifically reserved for private networks according to RFC1918.
KY
Kyoko
1 year ago
Hmm, 193.168.1.0/24 looks like a typo. I'm going to go with B) 10.254.1.0/24 - it just sounds more like a private network address.
DA
Darrin
1 year ago
Yeah, I agree. 10.254.1.0/24 is definitely reserved for private networks.
BA
Barb
1 year ago
I think you're right, B) 10.254.1.0/24 is the correct private network address.
JA
Jannette
2 years ago
Hmm, you might be right. I need to review the RFC1918 specifications again to confirm.
RA
Rashad
2 years ago
I disagree, I believe the correct answer is A) 172.16.1.0/9 as it is also reserved for private networks according to RFC1918.
JA
Jannette
2 years ago
I think the answer is B) 10.254.1.0/24 because it falls within the range specified by RFC1918.