What is an X.509 Certificate?

• A.A digital document that verifies the identity of a website
• B.A digital document that verifies the identity of a company
• C.A digital document that verifies the identity of a device
• D.A digital document that verifies the identity of a person

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Which of the following commands changes the source IP address to 192.0.2.11 for all IPv4 packets which go through the network interface eth0?

• A.iptables ~t mangle ~A POSTROUTING ~i eth0 ~j SNAT -to~source 192.0.2.11
• B.iptables ~t mangle ~A POSTROUTING ~0 eth0 ~j SNAT -to~source 192.0.2.11
• C.iptables ~t nat ~A POSTROUTING ~i eth0 ~j DNAT --to~source 192.0.2.11
• D.iptables ~t nat ~A PREROUTING ~i eth0 ~j SNAT --to~source 192.0.2.11
• E.iptables ~t nat ~A POSTROUTING ~o eth0 ~j SNAT --to~source 192.0.2.11

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What effect does the following command have on TCP packets?
iptables- A INPUT d 10.142.232.1 p tcp --dport 20:21 j ACCEPT

• A.Accept all TCP traffic on port 20 and 21 for the IP address 10.142.232.1
• B.Forward all TCP traffic not on port 20 or 21 to the IP address 10.142.232.1
• C.Accept only TCP traffic from 10.142.232.1 destined for port 20 or 21.
• D.Drop all TCP traffic coming from 10.142.232.1 destined for port 20 or 21.

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Which of the following commands displays all ebtable rules contained in the table filter including their packet and byte counters?

• A.ebtables -L -t filter -Lv
• B.ebtables -t nat -L -v
• C.ebtables -t filter -Ln -L
• D.ebtables -L -Lc -t filter
• E.ebtables -t filter -L --Lc

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An X509 certificate contains the following information:
X509v3 Basic Constraints: critical CA:TRUE, pathlen:0
Which of the following statements are true regarding the certificate? (Choose THREE correct answers.)

• A.This certificate will not be accepted by programs that do not understand the listed extension.
• B.This certificate belongs to a certification authority.
• C.This certificate may never be used to sign any other certificates.
• D.This certificate may be used to sign certificates of subordinate certification authorities.
• E.This certificate may be used to sign certificates that are not also a certification authority.

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