Internet Control Message Protocol (ICMP) is used by (best choice): Select one: O a. routers and hosts to communicate application-level information routers and hosts to communicate transport-level information O b. O c. routers and hosts to communicate session-level information routers and hosts to communicate network-level information O d. O e clients and hosts to communicate network-level information O f. routers and hosts to communicate physical-level information 1 What valid host range is the IP address 192.168.208.143 255.255.255.192 Select one: O a. a part of? 192.168.208.129 through to 192.168.208.192 O b. 192.168.208.129 through to 192.168.208.191 O c. 192.168.208.129 through to 192.168.208.190 O d. 192.168.208.128 through to 192.168.208.189 2 Network Address Translation (NAT) was created so that (best choice): What is the broadcast address of the network 172.16.104.0 255.255.254.0? Select one: O a. 172.16.106.255 O b. 172.16.101.1 O c. 172.16.104.255 O d. 172.16.105.255 Select one: O a. just one IP address for all devices, or clients can change addresses of devices in local network without notifying outside world 3 O b. can change ISP without changing addresses of devices in local network devices inside local net not explicitly addressable, thus invisible by outside world (a security plus) O c. local network uses just one IP address as far as outside world is concerned or range of addresses not needed from ISP O d. only two other answers are correct O e. only three other answers are correct 4

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