Which of the following services belongs to NFSv4 and does not exist in NFSv3?

1. A. rpc.idmapd
2. B. rpc.statd
3. C. nfsd
4. D. rpc.mountd

Correct Answer: A

The content of which local file has to be transmitted to a remote SSH server in order to be able to log into the remote server using SSH keys?

1. A. ~/.ssh/authorized_keys
2. B. ~/.ssh/config
3. C. ~/.ssh/id_rsa.pub
4. D. ~/.ssh/id_rsa
5. E. ~./ssh/known_hosts

Correct Answer: A

Which of these tools provides DNS information in the following format?

1. A. dig
2. B. nslookup
3. C. host
4. D. named-checkconf
5. E. named-checkzone

Correct Answer: B

Which of the following commands can be used to connect and interact with remote TCP network services? (Choose two.)

1. A. nettalk
2. B. nc
3. C. telnet
4. D. cat
5. E. netmap

Correct Answer: BC

When the default policy for the netfilter INPUT chain is set to DROP, why should a rule allowing traffic to localhost exist?

1. A. All traffic to localhost must always be allowed
2. B. It doesn’t matter; netfilter never affects packets addressed to localhost
3. C. Some applications use the localhost interface to communicate with other applications
4. D. syslogd receives messages on localhost
5. E. The iptables command communicates with the netfilter management daemon netfilterd on localhost to create and change packet filter rules

Correct Answer: C