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NEW QUESTION: 1
Which two statements are correct regarding vSphere certificates? (Choose two.)
A. ESXi hosts have self-signed SSL certificates by default.
B. ESXi host upgrades do not preserve the SSL certificate and reissue one from the VMware Certificate Authority (VMCA).
C. ESXi hosts have assigned SSL certificates from the VMware Certificate Authority (VMCA) during install.
D. ESXi host upgrades preserve the existing SSL certificate.
Answer: C,D
Explanation:
Explanation/Reference:
Explanation:
B-) ESXi hosts that are upgraded from vSphere 5.x to vSphere 6.0 will continue using their Certificate Authority signed certificates if they were replaced in the previous versions. However, ESXi 5.x hosts that were running self-signed certificates and then upgraded to vSphere 6.0 will have their certificates regenerated using VMware-signed.
Fo rmore info link:
https://kb.vmware.com/selfservice/microsites/search.do?
language=en_US&cmd=displayKC&externalId=2113926
C-) In vSphere 6.0, VMware tried to address SSL certificates in a different manner. It introduced a new component called the "Platform Services Controller." The Platform Services Controller includes a fully-functional certificate authority, called the VMware Certification Authority (VMCA), that automatically manages the certificates used in vCenter and the ESXi hosts.
There are two steps to complete. First, you need to retrieve the root certificate from vCenter and convert it into something usable. Once you've done that, you need to deploy it as a Trusted Root Certificate. The easiest way to do this with multiple computers is to use Group Policy. Here are the steps to retrieve the certificate:
1.Open your Web browser.
2.Navigate to https://<fqdn of vcenter>
3. In the lower right-hand corner, click the Download Trusted Root CA link.------ for more:
https://pubs.vmware.com/vsphere-60/index.jsp#com.vmware.vsphere.security.doc/GUID-C91AFFAD- A830-4BBE-BF7C-F779A3AD03F1.html?resultof=%2522%2573%2573%256c%2522%2520
NEW QUESTION: 2
Answer:
Explanation:
Explanation
Read Uncommitted (aka dirty read): A transaction T1executing under this isolation level can access data changed by concurrent transaction(s).
Pros:No read locks needed to read data (i.e. no reader/writer blocking). Note, T1 still takes transaction duration locks for any data modified.
Cons: Data is not guaranteed to be transactionally consistent.
Read Committed: A transaction T1 executing under this isolation level can only access committed data.
Pros: Good compromise between concurrency and consistency.
Cons: Locking and blocking. The data can change when accessed multiple times within the same transaction.
Repeatable Read: A transaction T1 executing under this isolation level can only access committed data with an additional guarantee that any data read cannot change (i.e. it is repeatable) for the duration of the transaction.
Pros: Higher data consistency.
Cons: Locking and blocking. The S locks are held for the duration of the transaction that can lower the concurrency. It does not protect against phantom rows.
Serializable: A transaction T1 executing under this isolation level provides the highest data consistency including elimination of phantoms but at the cost of reduced concurrency. It prevents phantoms by taking a range lock or table level lock if range lock can't be acquired (i.e. no index on the predicate column) for the duration of the transaction.
Pros: Full data consistency including phantom protection.
Cons: Locking and blocking. The S locks are held for the duration of the transaction that can lower the concurrency.
References:
https://blogs.msdn.microsoft.com/sqlcat/2011/02/20/concurrency-series-basics-of-transaction-isolation-levels/
NEW QUESTION: 3
What is the address 127.0.0.1 used for?
A. network IP address
B. local loopback testing
C. local broadcast
D. link local address
Answer: B
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