Module 4: IP Services

Question 1

Which of the following statements best describe why WRED is useful for networks where the majority of traffic uses TCP (Select two choices.)

A. TCP packets have large header size
B. TCP sources reduce traffic flow when congestion occurs.
C. TCP packets must have priority over UDP.
D. TCP packets that are dropped must be retransmitted.
E. TCP packets cannot arrive out of sequence.

Answer 1

B. TCP sources reduce traffic flow when congestion occurs.
D. TCP packets that are dropped must be retransmitted.

Question 2

Which of the following protocols uses UDP port 514 (Select the best answer.)

A. NTP
B. syslog
C. TFTP
D. SNMPv3

Answer 2

B. syslog

NTP uses UDP port 123. TFTP uses UDP port 69. SNMP uses UDP ports 161/16

Question 3

Which of the following Application Layer protocols use UDP for unsynchronised, connectionless data transfer? (Select 2 choices.)

A. SMTP
B. HTTP
C. FTP
D. SNMP
E. TFTP

Answer 3

D. SNMP
E. TFTP

Question 4

Which of the following commands will automatically enable SSH on a router? (Select the best answer.)

A. no transport input telnet
B. crypto key zeroize rsa
C. enable secret
D. transport input ssh
E. crypto key generate rsa

Answer 4

E. crypto key generate rsa

Question 5

Place each Syslog message-logging keyword into its corresponding Syslog level (0 to 7)

• alerts
• critical
• debugging
• emergencies
• errors
• informational
• notifications
• warnings

Answer 5

0. emergencies
1. alerts
2. critical
3. errors
4. warnings
5. notifications
6. informational
7. debugging

Question 6

You want to configure your Cisco router to provide IP addresses to the computers on your network. The IP addresses should be assigned from the 192.168.1.0/26 address range.

Which of the following commands should you issue? (Select 2 choices.)

A. network 192.168.1.0 255.255.255.192
B. ip dhcp pool 1
C. ip address dhcp
D. network 192.168.1.0 0.0.0.63
E. host 192.168.1.0 255.255.255.192
F. dhcp pool 1

Answer 6

A. network 192.168.1.0 255.255.255.192
B. ip dhcp pool 1

Question 7

Which of the following is enabled on a Cisco router when you issue the ntp server command from global configuration mode? (Select the best answer.)

A. server mode
B. broadcast client mode
C. static client mode
D. authentication
E. symmetric active mode

Answer 7

C. static client mode
Network Time Protocol (NTP) static client mode is enabled on a Cisco router when you issue the ntp server command from global configuration mode.

Question 8

You want to configure SSH for incoming VTY connections on a new router. The router is running a K9 IOS image but has not yet been configured with a host name, a domain name, or an RSA key pair. In addition, the VTY lines are not yet configured to accept SSH connections.

You issue the crypto key generate rsa command from global configuration mode.

Which of the following messages will you most likely receive? (Select the best answer.)

A. Please create RSA keys to enable SSH.
B. Please define a domain-name first.
C. Please enable SSH as a transport mode.
D. Please define a hostname other than Router.
E. The name for the key will be:

Answer 8

D. Please define a hostname other than Router.