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【单选题】

The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．

A、one

B、two

C、three

D、four

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更多“The receiver uses（）satellites to compute latitude，longitude，altitude，and velocity．”相关的问题
第1题
[多选题] Which two steps does a receiver perform to validate a message using HMAC？ （）  

A、 decrypts the received MAC using a secret key  B、 compares the computed MAC vs. the MAC received  C、 authenticate the receivedmessage using the sender’s public key  D、 look up the sender’s public key  E、 extracts the MAC from the receivedmessage thenencrypts the received message with a secret keyto producethe MAC  F、 Computes the MAC using the receivedmessage and a secret key as inputs to the hash function  

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第2题
[单选题] You are given a PC, a router, and a cable. Select the correct combination that will allow you to log into the router locally using a terminal emulation program such as HyperTerminal.（）

A、Connect the PC's COM port to the router's console port using a straight-through cable.  B、Connect the PC's COM port to the router's console port using a rollover cable.  C、Connect the PC's COM port to the router's ethernet port using a straight-through cable.  D、Connect the PC's ethernet port to the router's ethernet port using a rollover cable.  E、Connect the PC's ethernet port to the router's ethernet port using a straight- through cable.  

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第3题
[] A technician needs to ensure that a specific application on a single home user's computer receives Internet traffic reliably. The home network provides access to three other users and the application relies on a specific protocol. Which of the following should the technician use?（） A technician needs to ensure that a specific application on a single home user's computer receives Internet traffic reliably. The home network provides access to three other users and the application relies on a specific protocol. Which of the following should the technician use?（）

A、A. DHCP  B、B. PAT  C、C. Proxy  D、D. IPX  

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第4题
[] Exchange of answerbacks act s a confirmation that the messages（）at the destination.

A、A.have received  B、B.have been received  C、C.are received  D、D.are being received  

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第5题
[单选题] Scrambling of SONET signals is done to （）.

A、prevent the leakage of external fiber emissions  B、provide the optical network with the highest level of security possible  C、assure an even distribution of 1's and 0's for extended transmitter life  D、assure an adequate number of transitions for clock recovery at the receiver  E、prevent the receiver from assuming AIS inadvertently when all 0's are received  

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第6题
[单选题] What is the result of issuing the frame-relay map ip 192.168.1.2 202 broadcast command?（）

A、defines the source IP address that i s used in all broadcast packets on DLCI 202  B、defines the DLCI that is used for all packets that are sent to the 192.168.1.2 IP address  C、defines the destination IP address that is used in all broadcast packets on DLCI 202  D、defines the DLCI on which packets from the 192.168.1.2 IP address are received  

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第7题
[单选题] What is the Cisco IOS default behavior for switching from the shared tree to the shortest path tree in PIM-SM operations？（）

A、immediately after receiving the first packet on the shared tree for a given （S，G）  B、after receiving over 1 kb/s traffic onthe shared tree for a given （S，G）  C、10 seconds after receiving the first packet on the shared tree for a given （S，G）  D、30 seconds after receiving the first packet on the shared tree for a given （S，G）  E、after receiving over 10 kb/s traffic onthe shared tree for a given （S，G）  

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第8题
[单选题] After performing a modification on the /etc/ssh/sshd_config file the operator needs to reinitialize the secure shell daemon to enable the new settings. Which of the following is the correct way to achieve this?（）

A、Use refresh -s sshd  B、Use init.sshd /etc/rc.ssh  C、Use /usr/sbin/sshd -restart  D、Use stopsrc -s sshd and then startsrc -s sshd  

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第9题
[单选题] A company uses Routers R1 and R2 to connect to ISP1 and ISP2, respectively, with Routers I1 and I2 used at the ISPs. R1 peers with I1 and R2; R2 peers with I2 and R1. Assuming as many default s ettings as possible are used on all four routers, which of the following is true about the next - hop IP address for routes R1 learns over its iBGP connection to R2?（）

A、The next hop is I2's BGP RID  B、The next hop is I2's IP address used on the R2 - I2 neigh bor relationship  C、The next hop is R2's BGP RID  D、The next hop is R2's IP address used on the R1 - R2 neighbor relationship  

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第10题
[] Process EIGRP 1 is redistributing routes from process OSPF 2. Which two of the following methods may be used to set the metrics of the redistributed routes?（）

A、A. Let the metrics default.  B、B. Set the metric components using the redistri bute command's metric keyword.  C、C. Set the metric components using the default - metric router subcommand.  D、D. Set the integer (composite) metric using the redistribute command's metric keyword.  

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