Virginia Tech

Department of Computer Science

CS6504 Mobile Computing

Spring 2007

Homework 1 (Total 20 pts)

Due in class on Wednesday January 31^st, 2007

Please hand in a hardcopy of your homework in a folder, which has your name and course number, in class on Wednesday Jan. 31st, 2007. (Always keep a copy of the homework you hand in).

Q1. (10 pts) We discussed lazy write-back within the disconnected operation of the coda file system. In your own words, summarize the lazy write-back technique and state how it allows for disconnected operation. Use the paper KS92 as reference.

Q2. (10 pts) Consider Table 1 in the paper FZ94. Construct a similar table comparing 4 recent PDAs and/or pocket PCs. Provide references for your information. Add a column which signifies whether the product you have chosen provides wireless access or not, and how it is provided.