afnetworking-vs-nsurlsession.m

// AFNetworking
[[AFHTTPSessionManager manager] GET:@"http://httpbin.org/ip" parameters:nil success:^(NSURLSessionDataTask *task, id JSON) {
    NSLog(@"IP Address: %@", JSON[@"origin"]);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
    NSLog(@"Error: %@", error);
}];


// NSURLSession
NSURL *URL = [NSURL URLWithString:@"http://httpbin.org/ip"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if (error) {
        NSLog(@"Error: %@", error);
    } else if (data && [data length] > 0) {
        NSError *JSONError = nil;
        id JSON = [NSJSONSerialization JSONObjectWithData:data options:0 error:&JSONError];
        if (JSONError) {
            NSLog(@"Error: %@", error);
        } else {
            NSLog(@"IP Address: %@", JSON[@"origin"]);
        }
    }
}];

// NSURLSession + HTTP Validation + Background JSON Processing
NSURL *URL = [NSURL URLWithString:@"http://httpbin.org/ip"];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
    if (error) {
        NSLog(@"Error: %@", error);
    } else if (data && [data length] > 0) {
        if (response && [response isKindOfClass:[NSHTTPURLResponse class]]) {
            if ([(NSHTTPURLResponse *)response statusCode] != 200) {
                return;
            }

            NSString *contentType = [(NSHTTPURLResponse *)response allHeaderFields][@"Content-Type"];
            if (contentType && ![contentType hasSuffix:@"/json"]) {
                return;
            }
        }

        NSError *JSONError = nil;
        dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0), ^{
            id JSON = [NSJSONSerialization JSONObjectWithData:data options:0 error:&JSONError];
            if (JSONError) {
                NSLog(@"Error: %@", error);
            } else {
                NSLog(@"IP Address: %@", JSON[@"origin"]);
            }
        });
    }
}];

In the sample code is, the AFNetworking also dealing with HTTP Validation + Background JSON Processing as well? Or is it that the sample code doesn't cover that part?