They don’t need to use the upgrade. For example you can use an old wallet and continue creating non segwit transactions just fine. 
- The implementation of a larger block size, witch was eventually not only proposed but also executed and is currently known as the (BCH) Bitcoin cash.
- It solved the issue of transaction malleability.
- The protocol update called segregated witness was first implemented on the Litecoin blockchain on May 11, 2017 and later on the Bitcoin blockchain on 23 August, 2017.
- No - Segwit was a softfork update to the protocol, it means that previously valid blocks are invalid because of a contraction of the ruleset.
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1 Increase the block limit (hard fork)
2 Malleability and full blocks
3 Segwitt made the ligtning network possible
4 No, it is a soft fork
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What was a proposed alternative to Segwit?
Block size increase -
What did Segwit solve more than just the scaling issue?
It also helps fix the issue of malleability. -
How is Segwit and the Lightning network connected?
Segwit supports the second layer protocol like Lightning network. -
Are people, wallets and other services forced to use Segwit?
No but in this 2021, I’m seeing this available and for a certain transaction it is now used.
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What was a proposed alternative to Segwit?
Changing the protocol to increase the block size from 1mB to something greater. Example, Bitcoin Cash. -
What did Segwit solve more than just the scaling issue?
It supposedly solved the Malleability issue, which is an ability to change signature data and potentially attack a transaction. -
How is Segwit and the Lightning network connected?
One is built upon the other. -
Are people, wallets and other services forced to use Segwit?
No they are not.
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Double the size of the block from 1 to 2 mb.
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Security, by removing the signature from the block.
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Segwit enabled second layer protocols which lightning can use, it takes small transactions off chain.
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No
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Increase block size/hardfork to BCH
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solves ‘transaction malleability’ which could be used to manipulate transaction data.
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SegWit made the second layer possible, the lightning network is a 2nd layer solution.
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No, some nodes still use pre SegWit.it was a ‘soft’ fork.
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- What was a proposed alternative to Segwit?
Block size increase was proposed (which also lead to a hard fork -> Bitcoin Cash).
- What did Segwit solve more than just the scaling issue?
It solved the issue of transaction malleability by removing the signatures from the block.
- How is Segwit and the Lightning network connected?
SegWit supports the development of second layer protocols, such as the lightning network.
- Are people, wallets and other services forced to use Segwit?
No, old addresses and transactions can still be used (it is a soft fork).
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- What was a proposed alternative to Segwit?
Another proposed solution was to increase the block size from 1 MB to 2 MB.
- What did Segwit solve more than just the scaling issue?
Segwit also solved the problem of transaction malleability. By separating the signature from the transaction ID, it became much more difficult to alter the transaction ID of unconfirmed transactions.
- How is Segwit and the Lightning network connected?
Segwit allowed the development of second layer protocols like the lightning network. Separating the witness from the transaction ID freed the network up to be able to do more with unconfirmed transactions.
- Are people, wallets and other services forced to use Segwit?
No they are not, but the adoption of Segwit has grown a lot since it’s inception.
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What was a proposed alternative to Segwit?
The proposed alternative was to increase block size to 2 mB instead of 1 m B. -
What did Segwit solve more than just the scaling issue?
Segwit also solved transaction maleability problems where signatures could be changed resulting in false transactions
3 How is Segwit and the Lightning network connected?
Lightning allows for off-chain or second layer transactions that are faster
4 Are people, wallets and other services forced to use Segwit?
No - perhaps when segwit is adopted by everyone
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1: A block size increase was proposed as an alternative to segwit.
2: SegWit also solved the transaction malleability issue by removing the signature from the tx hash.
3: Lightning network as a layer 2 solution is only possible because transaction malleability was solved by segwig.
4: A soft fork so strangely no…
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- What was a proposed alternative to Segwit?
Increasing the block size to 2 MB
- What did Segwit solve more than just the scaling issue?
Transaction malleability
- How is Segwit and the Lightning network connected?
Segwit made it possible to build 2nd-layer solutions, of which Lightning is one.
- Are people, wallets and other services forced to use Segwit?
No
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- What was a proposed alternative to Segwit?
Increasing the Block size to 2mB - What did Segwit solve more than just the scaling issue?
Tx malleability - How is Segwit and the Lightning network connected?
Segwit makes second layer possible - Are people, wallets and other services forced to use Segwit?
No
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- Increase block size to 2mb
- Solved the tx malleability
- Segwit make this possible
- No.
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A proposed alternative was to increase the blocks weight, which has been done with the hardfork Bitcoin Cash.
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It also solved the transaction malleability, which was allowing potential scams and preventing any smart contract development on the blockchain.
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Thanks to the malleability fix, the Lightning Network is now able to take small transactions off-chain to make the network lighter.
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No, as it is a soft fork, old transactions can be done too.
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What was a proposed alternative to Segwit?
To increase the size of the block. -
What did Segwit solve more than just the scaling issue?
The transaction malleability problem, which means someone could change small details that changed the transaction ID. -
How is Segwit and the Lightning network connected?
By taking frequent, small transactions off-chain. -
Are people, wallets and other services forced to use Segwit?
No, there are wallets and other services that didn’t implemented yet.
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- increased block sizes
- security/transaction malleability
- segwit made second layer solutions possible
- no because it is a softfork
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The alternative to segwit was to change the rules and increase the blocksize from 1mb to 2mb.
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segwit solves more than the scaling issue because it also solved a security issue of signatures that allowed platforms to be built on top of bitcoin
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Lightning network is one of the platforms that resulted in the security solutions provided by segwit
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People, wallets, and other services are not forced to use segwit because it is backwards compatible and allows people to continue using as they have been.
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- Increase block size.
- Solved the transaction malleability and full block problem.
- The SegWit update supports development of second layer protocols. The malleability fix made any feature that relied on unconfirmed transactions less risky and easier to design.
- No, because it was a soft fork. As well, a fork called Bitcoin Cash was created which adopted the block size increase solution.
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What was a proposed alternative to Segwit?
Increasing the block size see f.e. Bitcoin Cash.
What did Segwit solve more than just the scaling issue?
It solved the transaction malleability problem as well not being able now to change the tx ID.
How is Segwit and the Lightning network connected?
Second layer solutions are now possible, you can take small transactions off-chain.
Are people, wallets and other services forced to use Segwit?
No as it’s a soft fork.
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