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一、单项选择题(共5道小题,共100.0分)
下面的H.248消息中,MGl与MGC通信时使用的IP地址和端口号分别是( )。
MGl→MGC:
MEGACO/1 [10.54.250.43]:2944
P=369363687{C=386{
A=A0,A=A100000124{
M{O{MO=RC,RV=OFF,RG=OFF,nt/jit=40},
L{v=0 c=IN IP4 10.54.250.43 m=audio 18300 RTP/AVP 8}}}}}
10.54.250.43和2944
10.54.250.43和18300
10.54.250.44和2944
10.54.250.44和18300
下面的H.248消息中,MGl为该呼叫分配的关联域标识号是( )。
MGl→MGC:
MEGACO/1 [10.54.250.43]:2944
P=369363687{C=386{
A=A0,A=A100000124{
M{O{MO=RC,RV=OFF,RG=OFF,nt/jit=40},
L{v=0 c=IN IP4 10.54.250.43 m=audio 18300 RTP/AVP 8}}}}}
369363687
386
A0
A100000124
H.248协议是( )与媒体网关之间的接口协议。
软交换设备
媒体资源服务器
信令网关
应用服务器
以下消息中,主叫用户的当前地址为( )。
INVITE Sip:watson @ bell-tel.com SIP/2.0
Via: SIP/2.0/UDP kton.bell-tel.com
From: A. Bell ( Sip: a.g.bell @ bell-tel.com)
To: T. Watson (Sip: watson @ bell-tel.com); tag = 37462311
Call-ID: 3298420296 @ kton.bell-tel.com
CSeq: 1 INVITE
Contact: Sip: a.g.bell @ kton.bell-tel.com
Content-Type: application/sdp
Content-Length =……
v=0
o = Watson 4858949 4858949 IN IP4 192.1.2.3
s = I'm on my way
c = IN IP4 kton.bell-tel.com
m = audio 5004 RTP/AVP 0 3
a.g.bell @ bell-tel.com
watson @ bell-tel.com
a.g.bell @ kton.bell-tel.com
watson @ boston.bell-tel.com
以下消息中,被叫用户的注册账号为( )。
INVITE Sip:watson @ bell-tel.com SIP/2.0
Via: SIP/2.0/UDP kton.bell-tel.com
From: A. Bell ( Sip: a.g.bell @ bell-tel.com)
To: T. Watson (Sip: watson @ bell-tel.com); tag = 37462311
Call-ID: 3298420296 @ kton.bell-tel.com
CSeq: 1 INVITE
Contact: Sip: a.g.bell @ kton.bell-tel.com
Content-Type: application/sdp
Content-Length =……
v=0
o = Watson 4858949 4858949 IN IP4 192.1.2.3
s = I'm on my way
c = IN IP4 kton.bell-tel.com
m = audio 5004 RTP/AVP 0 3
a.g.bell @ bell-tel.com
watson @ bell-tel.com
3298420296 @ kton.bell-tel.com
watson @ boston.bell-tel.com
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