4A0-100 Online Practice Questions and Answers

Which of the following are protocols belonging to the OSI suite of protocols? (Choose two)

A. OSPF

B. BGP

C. X.500

D. IS-IS

E. Ethernet

What is available for auto completion of commands within the CLI on the Nokia 7750 SR Service Router?

A. Type the first letters of the command, then press Ctrl C

B. Type the first letters of the command, then press Esc

C. Type the first letters of the command, then press Tab

D. Type the first letters of the command, then type ?

How is Ethernet II different from Ethernet 802.3?

A. Ethernet 802.3 can only be used on point-to-point links, while Ethernet II can be used on broadcast networks.

B. In Ethernet II the 2 bytes after the source MAC address is used as a type indicator. In Ethernet 802.3 these two bytes indicate the length of the frame.

C. In Ethernet 802.3, the 2 bytes after the source MAC address is used as a type indicator. In Ethernet II these two bytes indicate the length of the frame.

D. Ethernet II and Ethernet 802.3 are two different names for the same protocol

What metric does a link state protocol use to choose the best path to a destination network?

A. Link bandwidth.

B. Round trip time.

C. Hop count.

D. Route preference.

What must the sender do when it receives a window size of 0 from the receiver?

A. Stop transmitting.

B. Terminate the TCP session.

C. Send the next segment.

D. Retransmit the previous segment.

Which of the following are considered Virtual Private Networks? Choose all that apply.

A. IES

B. VPWS

C. VPLS

D. VPRN

The 201.148.26.0/24 network is subnetted using a /26 mask. How many subnets and host addresses will be obtained with this mask?

A. 4 subnets, 64 hosts

B. 64 subnets, 4 hosts

C. 4 subnets, 62 hosts

D. 64 subnets, 2 hosts

E. 6 subnets, 30 hosts

A switch with the MAC FDB shown in the exhibit receives an Ethernet frame with source MAC address 00:00:8c:01:00:0a and destination MAC address ff:ff:ff:ff:ff:ff. On which ports is the frame forwarded?

A. Only on port 1/1/1.

B. On all ports except 1/1/1.

C. On all four ports.

D. On none of the ports.

If a 5-port LAG is configured with the option of `port-threshold 2 action down', and dynamic-cost is enabled, what will happen if the total number of operational links in the LAG is 2?

A. The LAG cost is equal to the link cost divided by 3.

B. The LAG cost is equal to the link cost.

C. The LAG is operationally down.

D. The LAG cost is equal to the link cost divided by 5.

Which of the following enables service providers to support multiple customers with the same VLAN ID over the same backbone?

A. VLAN Trunking

B. VLAN Stacking

C. VLAN Tagging

D. VLAN Routing