为了测试连接性和延迟，我们可以指示你的电脑发送和接收少量的数据到谷歌的一个服务器，以及到你住宿的设备（这些被称为ping）。为此，我们可以使用一个叫做Crosh的应用程序，它默认安装在你的电脑上。

1. 按Ctrl+Alt+T来打开Crosh。Crosh外壳将在一个浏览器标签中打开。
2. 将窗口并排排列，并输入以下命令，每个窗口一个。
第一个窗口：ping -c 100 google.co.uk
第二个窗口：ping -c 100 gw


3. 按回车键，在每个窗口中启动命令。
4. 让所有100个ping都完成。你将知道测试何时结束，因为文本将停止滚动，你将看到 "ping统计 "字样。
   
5. 对结果进行截图，不对图片进行裁剪，以便我们可以看到时间戳。
6. 请将结果发送至 support@ask4.com，并提及你的问题参考号。

你的截图应该看起来像下面这样。

为了像你的设备那样看到无线环境，我们可以使用两个简单的Crosh "终端 "命令来整理我们需要的数据。这些命令帮助我们检查其他无线网络的干扰或设备的问题。

1. 按Ctrl+Alt+T来打开Crosh。Crosh外壳将在一个浏览器标签中打开。
   
2. 键入以下命令。
   
   network_diag - wifi
   
   按回车键，开始执行命令。
3. 这个测试将为你提供一些数据，请将其复制并粘贴到一个文本文件中。
   
   
   请展开这篇文章，看一个例子

              crosh> network_diag --wifi
              iw dev wlan0 survey dump:
              Survey data from wlan0
               frequency: 2412 MHz
               noise: -92 dBm
               channel active time: 63 ms
               channel busy time: 49 ms
               channel receive time: 45 ms
               channel transmit time: 0 ms
              Survey data from wlan0
               frequency: 2417 MHz
               noise: -93 dBm
               channel active time: 62 ms
               channel busy time: 47 ms
               channel receive time: 41 ms
               channel transmit time: 0 ms
               Survey data from wlan0
              frequency: 2422 MHz
               noise: -92 dBm
               channel active time: 63 ms
               channel busy time: 4 ms
               channel receive time: 0 ms
               channel transmit time: 0 ms
   
              [truncated]
   
              Survey data from wlan0
               frequency: 5220 MHz
               noise: -94 dBm
               channel active time: 124 ms
               channel busy time: 0 ms
               channel receive time: 0 ms
               channel transmit time: 0 ms
              Survey data from wlan0
               frequency: 5240 MHz [in use]
               noise: -94 dBm
               channel active time: 15723 ms
               channel busy time: 513 ms
               channel receive time: 185 ms
               channel transmit time: 3 ms
              Survey data from wlan0
               frequency: 5260 MHz
               noise: -94 dBm
               channel active time: 85031 ms
               channel busy time: 84907 ms
               channel receive time: 84907 ms
               channel transmit time: 84907 ms
   
             [truncated]
   
             iw dev wlan0 station dump:
             Station 00:11:74:##:##:## (on wlan0)
              inactive time: 5444 ms
              rx bytes: 11797197
              rx packets: 38419
              tx bytes: 1703260
              tx packets: 9779
              tx retries: 14295
              tx failed: 43
              signal: -58 dBm
              signal avg: -60 dBm
              tx bitrate: 24.0 MBit/s
              rx bitrate: 300.0 MBit/s MCS 15 40MHz short GI
              authorized: yes
              authenticated: yes
              preamble: long
              WMM/WME: yes
              MFP: no
              TDLS peer: no
             iw dev wlan0 scan dump:
             BSS 00:11:74:##:##:##(on wlan0) -- associated
              TSF: 61418055#### usec (7d, 02:36:20)
              freq: 5240
              beacon interval: 100 TUs
              capability: ESS Privacy SpectrumMgmt ShortSlotTime (0x0511)
             signal: -60.00 dBm
              last seen: 847370 ms ago
              Information elements from Probe Response frame:
              Supported rates: 24.0* 36.0 48.0 54.0 
              DS Parameter set: channel 48
              Country: US Environment: Indoor/Outdoor
              Channels [36 - 36] @ 24 dBm
              Channels [40 - 40] @ 24 dBm
              Channels [44 - 44] @ 24 dBm
              Channels [48 - 48] @ 24 dBm
              Channels [52 - 52] @ 23 dBm
              Channels [56 - 56] @ 23 dBm
              Channels [60 - 60] @ 23 dBm
              Channels [64 - 64] @ 23 dBm
              Channels [100 - 100] @ 24 dBm
              Channels [104 - 104] @ 24 dBm
              Channels [108 - 108] @ 24 dBm
              Channels [112 - 112] @ 24 dBm
              Channels [116 - 116] @ 24 dBm
              Channels [120 - 120] @ 24 dBm
              Channels [124 - 124] @ 24 dBm
              Channels [128 - 128] @ 24 dBm
              Channels [132 - 132] @ 24 dBm
              Channels [136 - 136] @ 24 dBm
              Channels [140 - 140] @ 24 dBm
              Channels [144 - 144] @ 24 dBm
              Channels [149 - 149] @ 30 dBm
              Channels [153 - 153] @ 30 dBm
              Channels [157 - 157] @ 30 dBm
              Channels [161 - 161] @ 30 dBm
              Channels [165 - 165] @ 30 dBm
              Power constraint: 3 dB
              BSS Load:
              * station count: 2
              * channel utilisation: 4/255
              * available admission capacity: 31250 [*32us]
              HT capabilities:
              Capabilities: 0x9ef
              RX LDPC
              HT20/HT40
              SM Power Save disabled
              RX HT20 SGI
              RX HT40 SGI
              TX STBC
              RX STBC 1-stream
              Max AMSDU length: 7935 bytes
              No DSSS/CCK HT40
              Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
              Minimum RX AMPDU time spacing: 8 usec (0x06)
              HT TX/RX MCS rate indexes supported: 0-15
              HT operation:
              * primary channel: 48
              * secondary channel offset: below
              * STA channel width: any
              * RIFS: 1
              * HT protection: no
              * non-GF present: 1
              * OBSS non-GF present: 0
              * dual beacon: 0
              * dual CTS protection: 0
              * STBC beacon: 0
              * L-SIG TXOP Prot: 0
              * PCO active: 0
              * PCO phase: 0
              VHT capabilities:
              VHT Capabilities (0x338001b2):
              Max MPDU length: 11454
              Supported Channel Width: neither 160 nor 80+80
              RX LDPC
              short GI (80 MHz)
              TX STBC
              RX antenna pattern consistency
              TX antenna pattern consistency
              VHT RX MCS set:
              1 streams: MCS 0-9
              2 streams: MCS 0-9
              3 streams: not supported
              4 streams: not supported
              5 streams: not supported
              6 streams: not supported
              7 streams: not supported
              8 streams: not supported
              VHT RX highest supported: 0 Mbps
              VHT TX MCS set:
              1 streams: MCS 0-9
              2 streams: MCS 0-9
              3 streams: not supported
              4 streams: not supported
              5 streams: not supported
              6 streams: not supported
              7 streams: not supported
              8 streams: not supported
              VHT TX highest supported: 0 Mbps
              VHT operation:
              * channel width: 1 (80 MHz)
              * center freq segment 1: 42
              * center freq segment 2: 0
              * VHT basic MCS set: 0xfffc
              WMM: * Parameter version 1
              * u-APSD
              * BE: CW 15-1023, AIFSN 3
              * BK: CW 15-1023, AIFSN 7
              * VI: CW 7-15, AIFSN 2, TXOP 3008 usec
              * VO: CW 3-7, AIFSN 2, TXOP 1504 usec
              RSN: * Version: 1
              * Group cipher: CCMP
              * Pairwise ciphers: CCMP
              * Authentication suites: IEEE 802.1X FT/IEEE 802.1X
              * Capabilities: PreAuth 1-PTKSA-RC 1-GTKSA-RC MFP-capable (0x0081)
              * 0 PMKIDs
              * Group mgmt cipher suite: AES-128-CMAC
             iw dev wlan0 link:
             Connected to 00:11:74:##:##:## (on wlan0)
              freq: 5240
              RX: 11797197 bytes (38419 packets)
              TX: 1703260 bytes (9779 packets)
              signal: -58 dBm
              tx bitrate: 24.0 MBit/s
   
              bss flags: short-slot-time
              dtim period: 1
              beacon int: 100
          

   
   
4. 接下来，再次打开Crosh，输入以下命令。
   
   连接显示服务
   
   按回车键，启动该命令。
5. 这个测试将为你提供一些数据，请将其复制并粘贴到一个文本文件中。
   
   
   请展开这一点，看一个例子。

             crosh> connectivity show services
   
            /service/12
             自动连接: true
             CheckPortal: auto
             Connectable: true
             ConnectionId:2069398120
             Country:美国
             DNSAutoFallback: false
             设备。/device/wlan0
             EAP.AnonymousIdentity: anonymous
             EAP.CACert: 
             EAP.CACertID: 
             EAP.CACertNSS: 
             EAP.CertID: 
             EAP.ClientCert: 
             EAP.EAP。PEAP
             EAP.身份。 
             EAP.InnerEAP: auth=MSCHAPV2
             EAP.KeyID: 
             EAP.KeyMgmt: WPA-EAP
             EAP.PIN: 
             EAP.PrivateKey: 
             EAP.RemoteCertification/0: /OU=域控制验证/CN=
             EAP.RemoteCertification/1: /C=US/ST=Arizona/L=Scottsdale/O=GoDaddy.com, Inc./OUhttp://certs.godaddy.com/repository//CN=Go Daddy Secure Certificate Authority - G2
             EAP.RemoteCertification/2:/C=US/ST=Arizona/L=Scottsdale/O=GoDaddy.com, Inc./CN=Go Daddy Root Certificate Authority - G2
             EAP.RemoteCertification/3: /C=US/O=The Go Daddy Group, Inc./OU=Go Daddy Class 2 Certification Authority
             EAP.SubjectMatch: 
             EAP.UseProactiveKeyCaching: false
             EAP.UseSystemCAs: true
             错误。未知
             ErrorDetails: 
             GUID: 5137BA48-0424-41B0-B5DE-29A427084925
             HTTPProxyPort：34599
             IPConfig:/ipconfig/wlan0_1_dhcp
             激活: true
             链接监视器禁用：false
             管理凭证：false
             模式：管理的
             名称。 
             需要密码: false
             PortalDetectionFailedPhase: 
             PortalDetectionFailedStatus: 
             以前的错误。 
             前次错误序列号：0
             优先级: 0
             PriorityWithinTechnology: 0
             配置文件。/profile/chronos/shill
             ProxyConfig: 
             SaveCredentials: true
             保存的IP.地址。192.168.1.20
             保存的IP.网关：192.168.1.1
             SavedIP.Mtu: 0
             保存的IP.NameServers。192.168.1.1
             SavedIP.PeerAddress: 
             SavedIP.Prefixlen: 26
             保存的IPConfig/0/Address。192.168.1.20
             SavedIPConfig/1/Gateway: 192.168.1.1
             SavedIPConfig/2/Mtu: 0
             保存的IPConfig/3/NameServers/0：192.168.1.1
             保存的IPConfig/4/PeerAddress。 
             已保存的IPConfig/5/Prefixlen: 26
             安全性: 802_1x
             安全等级。802_1x
             状态: 在线
             强度: 35
             捆绑。未检测到
             类型: wifi
             UID数据。 
             可见: true
             WiFi.AuthMode: 
             WiFi.BSSID: 00:11:74:###:###:###.
             WiFi.Frequency: 5240
             WiFi.FrequencyList/0: 2412
             WiFi.FrequencyList/1: 2462
             WiFi.FrequencyList/2: 5240
             WiFi.FrequencyList/3: 5320
             WiFi.HexSSID:########
             WiFi.HiddenSSID: false
             WiFi.PhyMode: 7
             WiFi.PreferredDevice: 
             WiFi.ProtectedManagementFrameRequired: false
             WiFi.RoamThreshold:0
             WiFi.VendorInformation/0/OUIList:00-03-7f
   
           /service/15
             自动连接：假
             检查门户：自动
             Connectable: true
             ConnectionId:0
             国家。美国
             DNSAutoFallback: false
             设备。/device/wlan0
             EAP.AnonymousIdentity: 
             EAP.CACert: 
             EAP.CACertID: 
             EAP.CACertNSS: 
             EAP.CertID: 
             EAP.ClientCert: 
             EAP.EAP。 
             EAP.身份。 
             EAP.InnerEAP: 
             EAP.KeyID: 
             EAP.KeyMgmt: NONE
             EAP.PIN: 
             EAP.PrivateKey: 
             EAP.SubjectMatch: 
             EAP.UseProactiveKeyCaching: false
             EAP.UseSystemCAs: true
             错误。未知
             ErrorDetails: 
             GUID。 
             HTTPProxyPort: 0
             IsActive: false
             LinkMonitorDisable: false
             管理证书：false
             模式：管理的
             名称。 
             PassphraseRequired: false
             PortalDetectionFailedPhase: 
             PortalDetectionFailedStatus: 
             PreviousError: 
             PreviousErrorSerialNumber: 0
             Priority: 0
             PriorityWithinTechnology: 0
             Profile: 
             ProxyConfig: 
             SaveCredentials: true
             Security: none
             SecurityClass: none
             State: idle
             Strength: 44
             Tethering: NotDetected
             Type: wifi
             UIData: 
             Visible: true
             WiFi.AuthMode: 
             WiFi.BSSID: 7c:69:f6:##:##:##
             WiFi.Frequency: 5320
             WiFi.FrequencyList/0: 5240
             WiFi.FrequencyList/1: 5320
             WiFi.HexSSID: ##########
             WiFi.HiddenSSID: false
             WiFi.PhyMode: 7
             WiFi.PreferredDevice: 
             WiFi.ProtectedManagementFrameRequired: false
             WiFi.RoamThreshold: 0
             WiFi.VendorInformation/0/OUIList: 00-10-18