Discussion
Home ‣ Certification ‣ Oracle Certification See What Others Are Saying!
- Question
Difference between Candidate key and Primary key?
- Correct Answer
- Candidate Key ? A Candidate Key can be any column or a combination of columns that can qualify as unique key in database There can be multiple Candidate Keys in one table Each Candidate Key can qualify as Primary Key Primary Key ? A Primary Key is a column or a combination of columns that uniquely identify a record Only one Candidate Key can be Primary Key One needs to be very careful in selecting the Primary Key as an incorrect selection can adversely impact the database architect and future normalization For a Candidate Key to qualify as a Primary Key, it should be Non-NULL and unique in any domain
- 1. Which two descriptions are correct about characteristics of IPv6 unicast addressing? (Choose two) A. Global addresses start with 2000::/3. B. Link-local addresses start with FF00::/10. C. Link-local addresses start with FE00:/12. D. There is only one loopback address and it is ::1. Discuss
- 2. What are the six OSPF route types? Discuss
- 3. How many non- overlapping channels are available with 802.11b?
Options- A. 3
- B. 12
- C. 23
- D. 40 Discuss
- 4. Which IEEE committee has been sanctioned by WAP and is called WPA2? Discuss
- 5. When a station sends a transmission to the MAC address ff : ff : ff : ff : ff : ff, what type of transmission is it?
Options- A. Unicast
- B. Multicast
- C. Anycast
- D. Broadcast Discuss
- 6. In the operation of CSMA/CD, which host(s) have priority after the expiration of the backoff algorithm?
Options- A. All hosts have equal priority
- B. The two hosts that caused the collision will have equal priority
- C. The host that sent the jam signal after the collision
- D. The host with the highest MAC address Discuss
- 7. What is the Classs A Private IP address space? Discuss
- 8. What is the Class C private IP address space? Discuss
- 9. To use VLSM, what capability must the routing protocols in use possess?
Options- A. Support for multicast
- B. Multi-protocol support
- C. Transmission of subnet mask information
- D. Support for unequal load balancing Discuss
- 10. If you wanted administrators to see a message when logging into the router, which command would you use?
Options- A. message banner motd
- B. banner message motd
- C. banner motd
- D. message motd Discuss
More questions
Correct Answer: : A , D Explanation: An IPv6 Unicast address identifies a single network interface The Internet Protocol delivers packets sent to a unicast address to that specific interface
Correct Answer: Intra-area, inter area, El, E2, Nl, and N2
Correct Answer: 3
Explanation:
The IEEE 802.11b standard provides three non-overlapping channels.
Correct Answer: The IEEE 80211i standard has been sanctioned by WPA and is termed WPA version 2
Correct Answer: Broadcast
Explanation:
A transmission to the MAC address ff : ff : ff : ff : ff : ff is a broadcast transmission to all stations.
Correct Answer: All hosts have equal priority
Explanation:
After the expiration of the backoff algorithm , all hosts have equal priority.
Correct Answer: 10000 through 10255255255
Correct Answer: 19216800 through 192168255255
Correct Answer: Transmission of subnet mask information
Explanation:
To use VLSM, the routing protocols in use possess the capability to transmit subnet mask information.
Correct Answer: banner motd
Explanation:
The typical banner is a message of the day (MOTD) and is set by using the global configuration mode command banner motd.
Comments
There are no comments.Programming
Copyright ©CuriousTab. All rights reserved.