1 . Which security protocol or measure would provide the greatest protection for a wireless LAN? WPA2 cloaking SSIDs shared WEP key MAC address filtering 2 . Refer to the exhibit. All trunk links are operational and all VLANs are allowed on all trunk links. An ARP request is sent by computer 5. Which device or devices will receive this message? only computer 4 computer 3 and RTR-A computer 4 and RTR-A computer 1, computer 2, computer 4, and RTR-A computer 1, computer 2, computer 3, computer 4, and RTR-A all of the computers and the router 3 . Refer to the exhibit. Hosts A and B, connected to hub HB1, attempt to transmit a frame at the same time but a collision occurs. Which hosts will receive the collision jamming signal? only hosts A and B only hosts A, B, and C only hosts A, B, C, and D only hosts A, B, C, and E 4 . Refer to the exhibit. Router RA receives a packet with a source address of 192.168.1.65 and a destination address of 192.168.1.161...
I have done some iphone apps after doing Android.
ReplyDeleteObjective-c is just another language; not at all hard to learn.
Understand how iPhone memory works. How the ref count and AutoreleasePools stack works. This should be the most important thing to learn.
You will love the interface builder. Creating a new screen for the iPhone is much easier.
iPhone's version of the Android ListView is called a TableView. More or less the same but you need to define an amount of sections.
I love how iPhone devs use the Delegate pattern, I am using it in Android now. Pay attention to that.
Resources can have their own folders. For example: A drawable can be in /car/model/drawable
Adding animation to iphone objects is VERY easy. You will notice that a lot of methods have a last parameter with BOOL animated.
Creating custom components is easier.
Things that made me lose a lot of time:
You can send msgs to NIL.
Logs are not as friendly as Android's.
You need to add every file to the project. It's not just putting it in the correct place.
Updates to the env means downloading 2GB every time.
When printing logs with NSLog, NSString needs to use %@ not %s.
Xcode has some strange behavior. The cursor moves around your screen.
Merging commits in iPhone source is hard. The project file and the xibs always get conflicts.
I just want to say that Dont use Interface Builder, Try to make application through coding
ReplyDeletewith this you will easily catch the building process for IPhone program.