Suppose MegaBigCompany.com has an IP address range of 222.22/16 and sets up its

Question

Suppose MegaBigCompany.com has an IP address range of 222.22/16 and sets up its firewall rules table as below. Select the packet(s) or c which will go through the firewall. Firewall Rules table from Section 8.9.1 (Firewalls) on col e Port Dest Port IP outside of allow 222.22/16 TCP 1023 80 any 222.22/16 allow outside of 222.22/16 222.22/16TCP 80 1023ACK outside of o 222.22/16 222.22/16 allow 53- outside of allow 222.22/16 UDP 53 1024 222.22/16 all all O A. A user inside MegaBigCompany.com starts a TCP connection to a web server's default port at IP address 222.24.34.7 O B. A user from remus.cs.rutgers.edu tries to access MegaBigCompany.com's web server at 222.22.16.24 at the default port 80. O C. A user inside MegaBigCompany changes her DNS server to use 8.8.8.8 on UDP instead of 192.168.16.1 using TCP. She then does a DNS lookup of remus.cs.rutgers.edu, which has IP address 128.6.13.3. O D. A user from remus.cs.rutgers.edu makes a DNS query for "fubar.MegaBigCompany.com, at the company's DNS server at 222.22.16.1, using the default UDP port E. A user inside MegaBigCompany makes a Skype call to prolog.cs.rutgers.edu. which has IP address 128.6.13.235

Explanation / Answer

Solution:

A)

Because the default port is port 80, and the user's IP address is out of class but because of port 80 in TCP, it is allowed in the table./

D is also granted the access request.

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