Nokia 4A0-100 Online Practice Questions and Exam Preparation

Nokia 4A0-100 Online Questions & Answers

• Question 191:

  What is the purpose of the source and destination ports in the TCP header?

  A. These ports identify the physical location of the sender and the receiver on the IP router.
  B. These ports are used as addresses to communicate with the IP layer.
  C. TCP does not use source or destination ports.
  D. These ports are used as an address to identify the upper layer application using the TCP connection.
  D. These ports are used as an address to identify the upper layer application using the TCP connection.

• Question 192:

  Which of the following IP header fields defines the way packets should be queued?

  A. Type of Service
  B. Identification
  C. Flags
  D. Protocol
  A. Type of Service

• Question 193:

  Which of the following is NOT a function of the Internet layer in the TCP/IP model?

  A. Unique network addressing scheme to identify hosts globally
  B. Orderly access to the transmission medium
  C. Routing protocols for path determination
  D. End-to-end forwarding of datagrams
  B. Orderly access to the transmission medium

• Question 194:

  Which of the following describes a static default route?

  A. An entry included in the default configuration of the router that is used if no dynamic routing protocols or static routes are configured.
  B. A wildcard entry used when the destination network is not specifically defined in the routing table.
  C. An entry selected based on the route that has the least cost to the destination (path with the most physical bandwidth)
  D. An entry used by the routing protocol when it is unable to calculate the best route to the destination.
  B. A wildcard entry used when the destination network is not specifically defined in the routing table.

• Question 195:

  Which of the following best describes an Ethernet switch?

  A. A passive device used to connect cables without signal amplification.
  B. A device that receives and retransmits data without Layer 2 header inspection.
  C. A device that receives and retransmits data based on the Layer 2 destination address.
  D. A device that receives and retransmits data based on the Layer 3 destination address.
  C. A device that receives and retransmits data based on the Layer 2 destination address.

• Question 196:

  Which of the following is a feature of Layer 3?

  A. Provides an universal addressing scheme
  B. Ensures data is delivered across the Layer 2 network.
  C. Provides reliable data transfers.
  D. Provides a physical interface to the network.
  A. Provides an universal addressing scheme

• Question 197:

  Which of the following type of addressing scheme delivers information from one source to all devices who are members of a specific group?

  A. Anycast.
  B. Multicast.
  C. Broadcast.
  D. Unicast.
  B. Multicast.

• Question 198:

  How does a VPRN service avoid the problem of overlapping IP addresses from different customers?

  A. You cannot have overlapping IP addresses. The service provider must ensure that its customers are all using discrete IP address space.
  B. Each VPRN service maintains a separate VPN routing and forwarding instance to separate customer routing information.
  C. A VPRN will ignore IP addressing information and use MAC addressing instead which are always unique.
  D. A VPRN will translate customer IP addresses to a private addressing scheme administered by the service provider.
  B. Each VPRN service maintains a separate VPN routing and forwarding instance to separate customer routing information.

• Question 199:

  What operation is performed by an egress Label Edge Router (eLER) when it receives an MPLS labeled packet?

  A. It forwards the packet to the next LSR without altering the MPLS label.
  B. It swaps the MPLS label and forwards the packet to the next LSR.
  C. It pushes a new MPLS label and forwards the packet to the next LSR.
  D. It pops the MPLS label and forwards the packet to the next IP router.
  D. It pops the MPLS label and forwards the packet to the next IP router.

• Question 200:

  Which tier of Internet service providers can reach any part of the Internet without having to purchase transit services from other Internet service providers?

  A. A Tier 1 ISP
  B. A Tier 2 ISP
  C. A Tier 3 ISP
  D. Tier 1 and Tier 2 ISPs
  A. A Tier 1 ISP