ITN Final exam 2 of 5

On the basis of the output, which two statements about network connectivity are correct? (Choose two.)

• This host does not have a default gateway configured.

• There are 4 hops between this device and the device at 192.168.100.1.

• There is connectivity between this device and the device at 192.168.100.1.

• The connectivity between these two hosts allows for videoconferencing calls.

• The average transmission time between the two hosts is 2 milliseconds.

Answer explanation

The output displays a successful Layer 3 connection between a host computer and a host at 19.168.100.1. It can be determined that 4 hops exist between them and the average transmission time is 1 milliseconds. Layer 3 connectivity does not necessarily mean that an application can run between the hosts.

Which two statements describe how to assess traffic flow patterns and network traffic types using a protocol analyzer? (Choose two.)

• Capture traffic on the weekends when most employees are off work.

• Capture traffic during peak utilization times to get a good representation of the different traffic types.

• Only capture traffic in the areas of the network that receive most of the traffic such as the data center.

• Perform the capture on different network segments.

• Only capture WAN traffic because traffic to the web is responsible for the largest amount of traffic on a network.

Answer explanation

Traffic flow patterns should be gathered during peak utilization times to get a good representation of the different traffic types. The capture should also be performed on different network segments because some traffic will be local to a particular segment.

What is the consequence of configuring a router with the ipv6 unicast-routing global configuration command?​

• All router interfaces will be automatically activated.

• The IPv6 enabled router interfaces begin sending ICMPv6 Router Advertisement messages.

• Each router interface will generate an IPv6 link-local address.​

• It statically creates a global unicast address on this router.​

Which three layers of the OSI model map to the application layer of the TCP/IP model? (Choose three.)

• application

• network

• data link

• session

• presentation

Answer explanation

The TCP/IP model consists of four layers: application, transport, internet, and network access. The OSI model consists of seven layers: application, presentation, session, transport, network, data link, and physical. The top three layers of the OSI model: application, presentation, and session map to the application layer of the TCP/IP model.

If PC1 is sending a packet to PC2 and routing has been configured between the two routers, what will R1 do with the Ethernet frame header attached by PC1?

• nothing, because the router has a route to the destination network

• open the header and use it to determine whether the data is to be sent out S0/0/0

• open the header and replace the destination MAC address with a new one

• remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0

Answer explanation

When PC1 forms the various headers attached to the data one of those headers is the Layer 2 header. Because PC1 connects to an Ethernet network, an Ethernet header is used. The source MAC address will be the MAC address of PC1 and the destination MAC address will be that of G0/0 on R1. When R1 gets that information, the router removes the Layer 2 header and creates a new one for the type of network the data will be placed onto (the serial link).

What will happen if the default gateway address is incorrectly configured on a host?

• The host cannot communicate with other hosts in the local network.

• The host cannot communicate with hosts in other networks.

• A ping from the host to 127.0.0.1 would not be successful.

• The host will have to use ARP to determine the correct address of the default gateway.

• The switch will not forward packets initiated by the host.

What are two features of ARP? (Choose two.)

• When a host is encapsulating a packet into a frame, it refers to the MAC address table to determine the mapping of IP addresses to MAC addresses.

• An ARP request is sent to all devices on the Ethernet LAN and contains the IP address of the destination host and its multicast MAC address.

• If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast.

• If no device responds to the ARP request, then the originating node will broadcast the data packet to all devices on the network segment.

• If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.

A network administrator is adding a new LAN to a branch office. The new LAN must support 90 connected devices. What is the smallest network mask that the network administrator can use for the new network?

• 255.255.255.128

• 255.255.255.240

• 255.255.255.248

• 255.255.255.224

What are two ICMPv6 messages that are not present in ICMP for IPv4? (Choose two.)

• Neighbor Solicitation

• Destination Unreachable

• Host Confirmation

• Time Exceeded

• Router Advertisement

A client packet is received by a server. The packet has a destination port number of 80. What service is the client requesting?

• DHCP

• SMTP

• DNS

• HTTP