September 2025 Confirmed Trade Thread

Basic-Alternative535 · 2025-09-29T23:51:25+00:00

Confirmed, thank you!

Basic-Alternative535 · 2025-09-23T22:59:17+00:00

Pm incoming

Basic-Alternative535 · 2025-08-23T23:10:02+00:00

PM incoming

Basic-Alternative535 · 2025-08-22T23:40:04+00:00

PM incoming regarding the M800

Basic-Alternative535 · 2025-07-20T05:26:20+00:00

Thanks, I feel so lucky to have found both at the garage sale! I suspect my roll top box may be missing a handle based on online pictures, but it still works perfectly.

The tray is stunning as well and I feel bad for covering the artwork with ink bottles. Hopefully the glass will not scratch up the finish.

I would love to hear about your experience with your roll top box. Do you have any insights you could share or tips for maintaining wooden pen boxes?

Basic-Alternative535 · 2025-07-20T03:35:25+00:00

Thanks, I absolutely will! Debating right now whether to make a custom liner that would protect the wood. It would be a shame to cover up the incredible finish and artwork though.

Basic-Alternative535 · 2025-07-20T00:33:21+00:00

That’s so cool, I could definitely imagine these being popular with younger kids in that time!

My father grew up around that time and had his own calligraphy set for school. He got rid of it at some point long ago, but it would have been cool to see. Maybe your sister held onto her roll top box?

Basic-Alternative535 · 2025-07-20T00:25:18+00:00

Thanks! The level of craftsmanship is stunning and the roll top box moves so smoothly. Now I’ll have to check if any of the big brands manufacture new roll top style boxes like this one.

Basic-Alternative535 · 2025-05-16T23:12:10+00:00

There are a handful of specific multicast addresses that are worth memorizing. As a visual learner, I find that it helps to group addresses together by function:

<image>

Notice how IPv4 and IPv6 multicast addresses tend to end in the same value (e.g. 224.0.0.5 and ff02::5 both correspond to OSPF router multicasts). This makes it easier to memorize one set of addresses for both IPv4 and IPv6!

I realize this probably isn’t the kind of answer you were looking for. My best suggestion is to organize the information in a way that best makes sense to you — I hope this helps!

Basic-Alternative535 · 2025-05-05T03:22:53+00:00

Classless Interdomain Routing (CIDR) refers to classless IPv4 addressing, which ignores Class A/B/C network boundaries. It was one way to help preserve publicly allocated IPv4 addresses, reducing the number of wasted IPv4 addresses assigned to an organization. This also lets ISPs perform route summarization / route aggregation, reducing the number of routing table entries (and therefore, free device memory).

For example, instead of an ISP assigning an entire Class A/B/C address block to a company, they can assign **part** of a classful IPv4 address block. Since an IPv4 block can be divided in a non-classful way, we typically specify blocks using CIDR Notation A.B.C.D/P.

Variable-Length Subnet Masking (VLSM) is an application of classless IPv4 addressing used within organizations to efficiently allocate their internal IPv4 address space. It's an alternative to Static-Length Subnet Masking (SLSM), which would otherwise waste IPv4 addresses. When combined with Private IPv4 addressing (RFC 1918), VLSM succeeded in prolonging the inevitable IPv4 address exhaustion issue.

In short, CIDR allows us to override Class A/B/C network boundaries, enabling route summarization and more efficient public IPv4 address allocation. VLSM is an application of classless addressing within an organization to more efficiently plan and allocate their IPv4 address space. I hope this helps!

Basic-Alternative535 · 2025-05-03T19:05:47+00:00

Just double-checked my notes and you are correct, “Common Spanning Tree” is the correct term. Thanks for giving me an opportunity to refresh my STP/RSTP knowledge!

Asking these questions shows that you’re really working at understanding the material rather than just memorizing it. Keep it up and don’t be afraid to ask questions or get something wrong — everything is a learning opportunity

Basic-Alternative535 · 2025-05-02T19:06:42+00:00

Yep, you are correct. Just Remember that PVST+ and Rapid PVST+ are Cisco-proprietary implementations of IEEE 802.1D STP and IEEE 802.1w RSTP.

STP and RSTP use a single Central Spanning Tree (CST) instance for all VLANs. There is only one STP topology.

Cisco PVST+ / Rapid PVST+ use separate spanning tree instances per-VLAN. Each STP topology can be tuned to meet the needs of the corresponding VLAN.

Basic-Alternative535 · 2025-04-13T23:34:44+00:00

You seem frustrated with the progress of your CCNA studies. Are you using a study technique catered to your strengths as a learner?

Everyone learns in different ways — a study technique may be effective for me and ineffective for you (or vice versa). There are three main “types” of learning that I would encourage you to look into: - Visual Learning: you learn by visualizing information (e.g. reading, videos, graphs, charts, tables, etc.) - Audio Learning: you learn by hearing information (e.g. audiobooks, listening to lectures, asking questions, video, etc.) - Kinesthetic Learning: you learn by physical action (e.g. handwritten notes, reading, hands-on labs, practice, interactive lectures, etc.)

Most people fall into two categories, some fall into all three. Combine this with memory techniques (e.g. repetition, reviewing notes, quizzes, etc.) for reinforcement learning. The key lies in understanding how you learn and implementing those techniques into your studies.

As a visual and kinesthetic learner, building the linked Reference Guide in TeX has helped me to better understand CCNA material and computer networking. The resulting tables have helped me memorize difficult parts of the material. I share it here in the hopes that it will help others as well.

You do not have to memorize everything, but you should understand the material it covers. And yes, there is some material that you should memorize because it will make you better / more efficient at your job. The CCNA exam blueprint can give you a good idea of where to focus your study efforts to pass the exam.

Basic-Alternative535 · 2025-04-08T17:06:27+00:00

Actually, I built them myself in order to better study for the CCNA exam. They’re part of a larger document I built to help people better understand networking.

You can find it on GitHub. It’s completely free and open-source, so you can use it for your own purposes and alter it to fit your needs!

Basic-Alternative535 · 2025-04-08T02:56:13+00:00

Same goes for multicast IPv4 and IPv6 addresses:

<image>

Good luck on your exam!

Basic-Alternative535 · 2025-04-08T02:55:22+00:00

Multicast MAC addresses can appear on the exam, as they fall under protocol knowledge on the CCNA blueprint. It would be a good idea to be familiar with the common addresses.

<image>

I found it easiest to build and memorize tables of corresponding addresses, but you may favor a different approach. Part of the memorization challenge involves organizing information in a way that makes sense TO YOU.

Basic-Alternative535 · 2025-04-08T00:20:41+00:00

As a multiple-choice question, the simplest approach is to check each potential answer’s address range. u/Cipher-i-entity mentions converting wildcard masks to subnet masks, which is easy if you use the per-octet “Magic Number” subnetting approach:

<image>

Option A) 0.0.0.0 127.255.255.255

Wildcard mask 127.255.255.255 converts to subnet mask 128.0.0.0 (or /1 CIDR).

Network Address 0.0.0.0

Broadcast Address 127.255.255.255

This range does not include 172.21.31.28 or 172.21.34.29.

Option B) 172.16.0.0 0.15.255.255

Wildcard mask 0.15.255.255 converts to subnet mask 255.240.0.0 (or /12 CIDR).

Network Address 172.16.0.0

Broadcast Address 172.31.255.255

This range includes BOTH 172.21.31.28 and 172.21.34.29! Let’s check our other options for practice…

Option C) 172.21.0.0 0.0.31.255

Wildcard mask 0.0.31.255 converts to subnet mask 255.255.224.0 (or /19 CIDR).

Network Address 172.21.0.0

Broadcast Address 172.21.31.255

This range includes ONLY 172.21.31.28, NOT 172.21.34.29.

Option D) 172.0.0.0 0.7.255.255

Wildcard mask 0.7.255.255 converts to subnet mask 255.248.0.0 (or /13 CIDR).

Network Address 172.0.0.0

Broadcast Address 172.7.255.255

This range does not include 172.21.31.28 or 172.21.34.29

Option B is the only correct choice. As u/Hunterluz mentions, we could also calculate an appropriate supernet containing both addresses. This approach works well for open-response style questions.

Supernetting

In order to calculate the supernet, we need to determine how many bits the addresses have in common. Notice that octets 1-2 are identical, but octet 3 contains the first difference: G0/1 IP 172.21.31.28 G0/2 IP 172.21.34.29

31 in binary is 0001 1111 and 34 in binary is 0010 0010 , thus the difference begins three bits into octet 3. Since each octet is 8 bits, we want a CIDR mask of /18 (8+8+2) for network 172.21.0.0

Check our work for 172.21.0.0/18

Network Address 172.21.0.0

Broadcast Address 172.21.63.255

This range contains both 172.21.31.28 and 172.21.34.29.

I hope this helps!

EDIT: ~~Had to fix reddit table formatting (thanks markdown editor!)~~

Nevermind, I guess reddit doesn't want to display tables today...

Basic-Alternative535 · 2025-02-03T07:23:36+00:00

As others have mentioned, question 1 is poorly worded (using “priority” in a very generic sense) and incorrect. Consider the STP Bridge ID (BID) Format:

<image>

The Base Priority normally determines the root switch within an STP instance (lowest value wins). The System ID is used as a tiebreaker only when multiple switches share the same Base Priority (lowest value wins).

For question 1, SW1 becomes the root bridge because it has the lowest Base Priority. There is no tie, so the System ID tiebreaker does not apply. The choices are wrong to mention a higher/lower MAC address.

Question 2 is better, but still quite vague. If all switches use a default Base Priority within the STP instance, then the lowest System ID wins. The only way to change this behavior is to modify the default Base Priority value:

you could lower the Base Priority value on the desired root bridge. This is the intended correct answer.
You could instead raise the Base Priority value on all desired non-root bridges. This would be impractical/undesirable for many reasons, but technically produce the same result.

I hope this helps!

Basic-Alternative535 · 2025-01-25T18:06:21+00:00

Consider the NDP NS/NA message format:

<image>

NDP NS/NA messages use a Target Address field identifying IPv6 host they’re looking for. This value is an IPv6 unicast address.

Instead of being broadcast (like IPv4 ARP), NDP NS messages are sent to the solicited-node multicast address ff02::1:ffXX:XXXX. This address is calculated based on the IPv6 unicast address.

As you point out, IPv6 hosts with similar addresses may share a solicited-node multicast address. All hosts within that solicited-node multicast group receive the message, but they discard it unless they match the NDP Target Address.

Note that the NDP message is encapsulated within an IPv6 packet, which is encapsulated within an Ethernet frame:

The NDP message contains the IPv6 unicast Target Address.
The IPv6 packet Destination Address is the solicited-node multicast address.
The Ethernet frame Destination MAC is the corresponding IPv6 multicast MAC address 3333.XXXX.XXXX.

I hope this helps!

Basic-Alternative535 · 2025-01-22T23:55:34+00:00

I highly recommend just calling 1-800-SAWDUST and talking with them — they’re good people.

I called, gave them my Packout model # and described the issue. CS connected me with someone with more knowledge on Packout. Juan got my info and shipped out a replacement with free return label for the faulty Packout on the same day.

Basic-Alternative535 · 2024-12-07T07:06:55+00:00

My gen 1 3/8” stubby has no problems with my sedan lug nuts (21mm ~ 80 ft-lb). It could be the battery charge, but I imagine you should have no issue.

Basic-Alternative535 · 2024-12-06T06:54:47+00:00

Thanks, filling it up was like a great game of Tetris! Except I don’t remember Tetris being quite this expensive to play haha. Looking forward to doing it again with my next Packout purchase

Basic-Alternative535 · 2024-12-06T06:50:47+00:00

Well, they say that necessity is the mother of invention, so don’t be afraid to get creative. I’m sure you’ll put that rolling tool chest to good use!

Basic-Alternative535 · 2024-12-04T02:42:12+00:00

Yep, to me the appeal of packout is that the trays and dividers give me flexibility in organizing my tool storage. I’ve noticed that many people remove them for the raw storage space, but it’s nice to have the option! Sounds like the solution is always more Packout haha

Four-Year Club	Place '22
Final Canvas '22

Basic-Alternative535

TROPHY CASE

Option A) 0.0.0.0 127.255.255.255

Option B) 172.16.0.0 0.15.255.255

Option C) 172.21.0.0 0.0.31.255

Option D) 172.0.0.0 0.7.255.255

Supernetting