INTRODUCTION TO NETWORKS 2 OF 3

A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?

• FTP

• DHCP

• TELNET

• SSH

What are two problems that can be caused by a large number of ARP request and reply messages? (Choose two.)

• Switches become overloaded because they concentrate all the traffic from the attached subnets.

• The ARP request is sent as a broadcast, and will flood the entire subnet.

• The network may become overloaded because ARP reply messages have a very large payload due to the 48-bit MAC address and 32-bit IP address that they contain.

• A large number of ARP request and reply messages may slow down the switching process, leading the switch to make many changes in its MAC table.

• All ARP request messages must be processed by all nodes on the local network.

A group of Windows PCs in a new subnet has been added to an Ethernet network. When testing the connectivity, a technician finds that these PCs can access local network resources but not the Internet resources. To troubleshoot the problem, the technician wants to initially confirm the IP address and DNS configurations on the PCs, and also verify connectivity to the local router. Which three Windows CLI commands and utilities will provide the necessary information? (Choose three.)

• netsh interface ipv6 show neighbor

• arp -a

• ping

• ipconfig

• nslookup

64. During the process of forwarding traffic, what will the router do immediately after matching the destination IP address to a network on a directly connected routing table entry?

• analyze the destination IP address

• switch the packet to the directly connected interface

• look up the next-hop address for the packet

• discard the traffic after consulting the route table

65. What characteristic describes antispyware?

• applications that protect end devices from becoming infected with malicious software

• a network device that filters access and traffic coming into a network

• software on a router that filters traffic based on IP addresses or applications

• a tunneling protocol that provides remote users with secure access into the network of an organization

66. A network administrator needs to keep the user ID, password, and session contents private when establishing remote CLI connectivity with a switch to manage it. Which access method should be chosen?

• TELNET

• AUX

• CONSOLE

• SSH

67. What are the two most effective ways to defend against malware? (Choose two.)

• Implement a VPN.

• Implement network firewalls.

• Implement RAID.

• Update the operating system and other application software.

• Install and update antivirus software.

68. Which type of security threat would be responsible if a spreadsheet add-on disables the local software firewall?

• BRUTE-FORCE ATTACK

• TROJAN HORSE

• DOS

• BUFFER OVERFLOW

69. Which frame field is created by a source node and used by a destination node to ensure that a transmitted data signal has not been altered by interference, distortion, or signal loss?

• User Datagram Protocol field

• transport layer error check field

• flow control field

• frame check sequence field

• error correction process field

70. A network administrator is adding a new LAN to a branch office. The new LAN must support 4 connected devices. What is the smallest network mask that the network administrator can use for the new network?

• 255.255.255.248

• 255.255.255.0

• 255.255.255.128

• 255.255.255.192