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NEW QUESTION: 1
Refer to the exhibit:
Based on the show/ command output, which result m true after BGP session is established?
A. The IOS XR router advertises and accepts all routes to and from eBGP neighbor 192.168.2.2
B. The IOS XR router does not advertise any routes to the neighbor 192.168.2.2,but it accepts all routes from 192.168.2.2.
C. The IOS XR router advertises all routes to the neighbor 192.168.2.2, but it does not accept any routes from 192.168.2.2
D. No routes are accepted from the neighbor 192.168.2.2, nor are any routes advertised to it
Answer: D
NEW QUESTION: 2
Under which circumstance should a network administrator implement one-way NAT?
A. when traffic that originates outside the network must be routed to internal hosts
B. when the network must route UDP traffic
C. when the network has few public IP addresses and many private IP addresses require outside access
D. when traffic that originates inside the network must be routed to internal hosts
Answer: A
Explanation:
NAT operation is typically transparent to both the internal and external hosts.
Typically the internal host is aware of the true IP address and TCP or UDP port of the external host. Typically the NAT device may function as the default gateway for the internal host. However the external host is only aware of the public IP address for the NAT device and the particular port being used to communicate on behalf of a specific internal host.
NAT and TCP/UDP
"Pure NAT", operating on IP alone, may or may not correctly parse protocols that are totally concerned with IP information, such as ICMP, depending on whether the payload is interpreted by a host on the "inside" or "outside" of translation. As soon as the protocol stack is traversed, even with such basic protocols as TCP and UDP, the protocols will break unless NAT takes action beyond the network layer.
IP packets have a checksum in each packet header, which provides error detection only for the header. IP datagrams may become fragmented and it is necessary for a NAT to reassemble these fragments to allow correct recalculation of higher-level checksums and correct tracking of which packets belong to which connection.
The major transport layer protocols, TCP and UDP, have a checksum that covers all the data they carry, as well as the TCP/UDP header, plus a "pseudo-header" that contains the source and destination IP addresses of the packet carrying the TCP/UDP header. For an originating NAT to pass TCP or UDP successfully, it must recompute the TCP/UDP header checksum based on the translated IP addresses, not the original ones, and put that checksum into the TCP/UDP header of the first packet of the fragmented set of packets.
The receiving NAT must recompute the IP checksum on every packet it passes to the destination host, and also recognize and recompute the TCP/UDP header using the retranslated addresses and pseudo-header. This is not a completely solved problem. One solution is for the receiving NAT to reassemble the entire segment and then recompute a checksum calculated across all packets.
The originating host may perform Maximum transmission unit (MTU) path discovery to determine the packet size that can be transmitted without fragmentation, and then set the don't fragment (DF) bit in the appropriate packet header field. Of course, this is only a one- way solution, because the responding host can send packets of any size, which may be fragmented before reaching the NAT.
NEW QUESTION: 3
You want to migrate your database to ASM, so you have done a clean shutdown, made a closed backup of the entire database. You noted the location of your control files and online redo log files, and changed your spfile to use OMF. The last step is to run an RMAN script to do the conversion. Using the following steps, what is the correct order in which the following RMAN commands should be executed?
1.STARTUP NOMOUNT
2.ALTER DATABASE OPEN RESETLOGS
3.SQL "ALTER DATABASE RENAME 'logfile1' path TO '+dgrp4'" # plus all other
4.SWITCH DATABASE TO COPY
5.BACKUP AS COPY DATABASE FORMAT '+dgrp4'
6.ALTER DATABASE MOUNT
7.RESTORE CONTROLFILE FROM 'controlfile_location'
logfiles
A. 5, 1, 2, 7, 4, 6, 3
B. 7, 3, 1, 5, 6, 2, 4
C. 1, 7, 6, 5, 4, 3, 2
D. 2, 5, 3, 1, 7, 6, 4
Answer: C
NEW QUESTION: 4
Exhibit:
Referring to the diagram provided for this question, an employee brought an unauthorized
AP from home, but did not attach it to the LAN infrastructure. The APs are in the VLANs as shown in the diagram. Only AP1 is within RF range of the employee AP.
By default, how will the Aruba system classify the employee's AP?
A. a Rogue AP
B. a valid workstation
C. an AP
D. an AM
E. an Interfering AP
Answer: E
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