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【单选题】
应用层的主要功能()。
A.
为操作系统或网络应用程序提供访问网络服务的接口。
B.
数据的表现形式、特定功能的实现如-加密
C.
可靠与不可靠的传输、传输前的错误检测、流控
D.
对应用会话的管理、同步
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】下列哪些是应用层协议：
A.
Telnet
B.
FTP
C.
HTTP
D.
SMTP
E.
POP3
F.
TCP/IP
G.
TCP
H.
UDP
I.
IP FTP; HTTP; SMTP; POP3】
【单选题】有如下事件过程：Private Sub Form_Load() Show Dim Arr() As Variant Arr = Array(1, 3, 5, 7, 9, 11, 13, 15) Call converse(Arr) For i = 0 To 7 Print arr(i); Next iEnd Sub 以上程序的功能是，通过调用Converse过程，将数组Arr中的元素逆序存放并输出...
A.
Private Sub converse(dim a() as Variant ) Dim T For i = LBound(A) To UBound(A) T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
B.
Private Sub converse(dim a() as Variant) Dim T Dim J As Integer J = (LBound(A) + UBound(A)) / 2 For i = LBound(A) To J T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
C.
Private Sub converse(a() As Variant) Dim T For i = LBound(A) To UBound(A) T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub
D.
Private Sub converse(a() As Variant) Dim T Dim J As Integer J = Int((LBound(A) + UBound(A)) / 2) For i = LBound(A) To J T = a(i) a(i) = a(UBound(A) - i) a(UBound(A) - i) = T Next i End Sub