Which of the following fields is set to 0 by the client and may be used by relay agents as they assist a client in obtaining an IP address and/or configuration information?
A. Hardware field
B. Hops field
C. Flags field
D. Transaction ID Number field
Answer: B
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Classify each of the followings in terms of unicast and multicast:
a. A student speaking to a friend on a wireless phone b. ii. An executive speaking on a conference-phone with managers in different cities. c. iii. A teacher lecturing in a classroom. d. iv. A child playing with another child using a “walkie-talkie”. e. v. The president addressing the nation on television Consider inter-human communications.
Suppose the file is not ordered by the non-key field DEPARTMENTCODE and we want to construct a secondary index on SSN using Option 3 of Section 18.1.3, with an extra level of indirection that stores record pointers. Assume there are 1000 distinct values of DEPARTMENTCODE, and that the EMPLOYEE records are evenly distributed among these values. Calculate (i) the index blocking factor bfr i (which is also the index fan-out fo); (ii) the number of blocks needed by the level of indirection that stores record pointers; (iii) the number of first-level index entries and the number of first-level index blocks; (iv) the number of levels needed if we make it a multi-level index; (v) the total number of blocks required by the multi-level index and the blocks used in the extra level of indirection; an
Consider a disk with block size B=512 bytes. A block pointer is P=6 bytes long, and a record pointer is P R =7 bytes long. A file has r=30,000 EMPLOYEE records of fixed-length. Each record has the following fields: NAME (30 bytes), SSN (9 bytes), DEPARTMENTCODE (9 bytes), ADDRESS (40 bytes), PHONE (9 bytes), BIRTHDATE (8 bytes), SEX (1 byte), JOBCODE (4 bytes), SALARY (4 bytes, real number). An additional byte is used as a deletion marker.
In Publisher, by default, every publication contains a master page
Indicate whether the statement is true or false
Page numbers can be modified by changing the number ________
Fill in the blank(s) with correct word