Free Nokia Scalable IP Networks 4A0-100 Exam Practice Test

Which of the following IP header fields contains information that indicates whether routers are allowed to fragment a packet?

• Header checksum.
• Fragmentation offset.
• Flags.
• Identification.

Which field in the TCP header is used by the receiver to indicate how many segments it can receive?

• Checksum
• SYN
• Destination port
• Window size
• MTU

A set of tasks that move a packet from its entry into an IP network to its exit from the IP network. This describes:

• IP routing.
• IP protocol.
• IP encapsulation.
• IP tunneling.

What is the purpose of TCP flow control?

• It restricts the sender from sending too much data when there is congestion in the network.
• It allows the receiver to control the rate at which the sender transmits data.
• It forces the sender to send only one segment at a time.
• It allows the receiver to drop segments without the sender having to retransmit.

Which of the following is an important advantage of protocol layering? (Choose two.)

• Controls distribution of IP addresses.
• Simplifies protocol functionality.
• Isolates changes in lower layers from upper layers.
• Increases protocol operational efficiencies.
• Layering adds to the fragmentation of the data

What is the name for an organization that provides Internet services to its customers?

• A large corporation.
• An ISP.
• A home based business.
• A content provider.

Which of the following is a characteristic of ATM?

• Application data is transported in 53-byte cells.
• ATM circuits are identified by a VPI/VCI value.
• Provides enhanced QoS support with 5 classes of service.
• Ideal for multiple services on the same physical line.
• All of the above.
• None of the above

What is the preference value in the routing table used for?

• To select from routes with different next-hops.
• To select from routes with different costs.
• To select from routes learned from different routing protocols.
• To select from routes with different prefixes.

Which bit pattern identifies the network address in the subnet mask?

• A string of consecutive 1's.
• A string of consecutive 0's.
• A string of alternating 10's.
• The network address is determined by masking the source address with a port's if Index binary representation.

Which of the following Ethernet rates requires an optical cable to operate?

• 10 Mb/s Ethernet.
• 100 Mb/s Ethernet.
• 1000 Mb/s Ethernet .
• There are copper and optical versions possible for all of these Ethernet data rates.