Chapter 4

Question 1

Access Control List

Answer 1

A sequential list of ACEs which filter traffic passing through an interface

Question 2

Access Control Entries (ACEs)

Answer 2

AKA ACL Statements: permit/deny statements which packets are compared to

Question 3

Wildcard Mask

Answer 3

A string of 32 binary digits that routers use to determine which bits of an adress to examine for a match

Question 4

ACL Application Rules

Answer 4

One ACL per protocol
One ACL per direction
One ACL per interface

Question 5

FTP Ports

Answer 5

20 (data), 21 (control)

Question 6

Remote Access Ports (SSH and Telnet)

Answer 6

22 (SSH), 23 (telnet)

Question 7

Mail ports (SMTP and POP3)

Answer 7

25 (SMTP), 110 (POP3)

Question 8

Dynamic Host Configuration Protocol (DHCP) Ports

Answer 8

67, 68

Question 9

File Trasnfer Protocols (TFTP, HTTP, HTTPS)

Answer 9

69 (TFTP), 80 (HTTP), 443 (HTTPS)

Question 10

Internet Message Access Protocol (IMAP) Port

Answer 10

143

Question 11

Simple Network Management Protocol (SNMP) Port

Answer 11

161

Question 12

Domain Name Service (DNS) Port

Answer 12

53