CCNA Introduction to Networking

Which two functions are performed at the LLC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)

• • enables IPv4 and IPv6 to utilize the same physical medium

  
  

• places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame

• • implements a process to delimit fields within an Ethernet 2 frame

  
  

• • integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper

  
  

What happens when the transport input ssh command is entered on the switch vty lines?

• 
  

• • The SSH client on the switch is enabled.

  
  

• • The switch requires a username/password combination for remote access.

  
  

• • Communication between the switch and remote users is encrypted.

  
  

• The switch requires remote connections via a proprietary client software.

Match the type of threat with the cause. (Not all options are used.)

• ini sudah benar

• cuma

• harap

• dihafalkan

A disgruntled employee is using some free wireless networking tools to determine information about the enterprise wireless networks. This person is planning on using this information to hack the wireless network. What type of attack is this?

• DoS

• • access

• Trojan horse

• • reconnaissance

  
  

What service is provided by HTTP?

• Uses encryption to secure the exchange of text, graphic images, sound, and video on the web.

• • Allows for data transfers between a client and a file server.

  
  

• • An application that allows real-time chatting among remote users.

  
  

• • A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.

  
  

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.

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

  
  

• • 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.

  
  

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.)

• • ping

• arp -a

• ipconfig

• • tracert

• • nslookup

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?

• • switch the packet to the directly connected interface

  
  

• analyze the destination IP address

• • look up the next-hop address for the packet

  
  

• discard the traffic after consulting the route table

What characteristic describes antispyware?

• 
  

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

  
  

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

  
  

• 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