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It can't be developed secretly.
NEW QUESTION: 1
Where should adapter configurations be validated before adding or rearranging adapters on a Power Enterprise Server?
A. System SSIC
B. System Rack Configuration
C. System Planning Tool
D. System HMC
Answer: C
Explanation:
Explanation/Reference:
Reference: https://www.ibm.com/support/knowledgecenter/POWER6/areab/areab.pdf
NEW QUESTION: 2
Which four statements about SeND for IPv6 are correct? (Choose four.)
A. It provides a method for secure default router election on hosts.
B. It authorizes routers to advertise certain prefixes.
C. It defines secure extensions for NDP.
D. Neighbor identity protection is provided by Cryptographically Generated Addresses that are derived from a Diffie-Hellman key exchange.
E. NDP exchanges are protected by IPsec SAs and provide for anti-replay.
F. It is facilitated by the Certification Path Request and Certification Path Response ND messages.
G. It protects against rogue RAs.
Answer: A,B,C,G
Explanation:
Secure Neighbor Discovery is a protocol that enhances NDP with three additional capabilities:
Address ownership proof
-
Makes stealing IPv6 addresses "impossible"
-
Used in router discovery, DAD, and address resolution
-
Based upon Cryptographically Generated Addresses (CGAs)
-
Alternatively also provides non-CGAs with certificates
Message protection
-
Message integrity protection
-
Replay protection
-
Request/response correlation
-
Used in all NDP messages
Router authorization
-
Authorizes routers to act as default gateways
-
Specifies prefixes that routers are authorized to announce "on-link"
While SeND provides a significant uplift to the IPv6 neighbor discovery technology by
introducing the above enhancements, it does not, for example, provide any end-to-end
security and provides no confidentiality.
It is important to understand that SeND is not a new protocol and still remains a protocol
operating on the link. Secure Neighbor Discovery is just an "extension" to NDP and defines
a set of new attributes:
New network discovery options
CGA, Nonce1, Timestamp, and RSA
Purpose: These options provide a security shield against address theft and replay attacks.
New network discovery messages
CPS (Certificate Path Solicitation), CPA2 (Certificate Path Advertisement)
Purpose: Identifying valid and authorized IPv6 routers and IPv6 prefixes of the network
segment. These two messages complement the already existing NDP messages (NS, NA,
RA, RS, and Redirect).
New rules
Purpose: These rules describe the preferred behavior when a SeND node receives a
message supported by SeND or not supported by SeND.
SeND technology works by having a pair of private and public keys for each IPv6 node in
combination with the new options (CGA, Nonce, Timestamp, and RSA). Nodes that are
using SeND cannot choose their own interface identifier because the interface identifier is
cryptographically generated based upon the current IPv6 network prefix and the "public"
key. However, the CGA interface identifier alone is not sufficient to guarantee that the CGA
address is used by the appropriate node.
For this purpose SeND messages are signed by usage of the RSA public and private key
pair. For example if node 1 wants to know the MAC address of node 2, it will traditionally
send a neighbor solicitation request to the node 2 solicited node multicast address. Node 2
will respond with a corresponding neighbor advertisement containing the MAC address to
IPv6 address mapping. Node 2 will in addition add the CGA parameters (which include
among others the public key) and a private key signature of all neighbor advertisement
fields. When node 1 receives this neighbor advertisement it uses the public key to verify
with the CGA address the private key signature of node 2. Once this last step has been
successfully completed, the binding on node 1 of the MAC address and CGA address of
node 2 can be successfully finalized.
Note that the above mechanism is simply an explanation to verify the correct relationship
between a node MAC address and its CGA IPv6 address. SeND does not check any of the
node's privileges to be allowed, or not allowed, on the network. If this is required, other
means of infrastructure protection will be required (such as 802.1x).
NEW QUESTION: 3
A network technician needs to separate a web server listening on port 80 from the internal LAN and secure the server from the public Internet. The web server should be accessible to the public Internet over port 80 but not the private LAN. Currently, the network is segmented with a network-based firewall using the following IP addressing scheme on each interface:
Which of the following ones should the technician use to place the web server and which of the following firewall rules should the technician configure?
A. Place the web server in the public zone with an inbound rule from eth0 interface to accept traffic over port 80 designated to the web server
B. Place the web server in the DMZ with an inbound rule from eth1 interface to eth0 to accept traffic over port 80 designated to the web server
C. Place the web server in the DMZ with an inbound rule from eth0 interface to eth1 to accept traffic over port 80 designated to the web server
D. Place the web server in the private zone with an inbound rule from eth2 interface to eth1 to accept traffic over port 80 designated to the web server
Answer: C
NEW QUESTION: 4
Why should the Postfix parameter disable_vrfy_command be set to yes on a publicly accessible mail server?
A. It enables verification attempts on the sender e-mail address.
B. It prevents some techniques of gathering existing e-mail addresses.
C. It speeds up forwarding of relayed e-mail.
D. It prevents e-mail delivery attempts to a non-existent user.
Answer: B