51-86 OKC

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

• • Neighbor Solicitation

• • Host Confirmation

• • Destination Unreachable

• • 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

What is an advantage for small organizations of adopting IMAP instead of POP?

• • POP only allows the client to store messages in a centralized way, while IMAP allows distributed storage.

• • Messages are kept in the mail servers until they are manually deleted from the email client.

• When the user connects to a POP server, copies of the messages are kept in the mail server for a short time, but IMAP keeps them for a long time

• • IMAP sends and retrieves email, but POP only retrieves email.

54. A technician can ping the IP address of the web server of a remote company but cannot successfully ping the URL address of the same web server. Which software utility can the technician use to diagnose the problem?

• • tracert

• • ipconfig

• • netstat

• • nslookup

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

• • implements CSMA/CD over legacy shared half-duplex media

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

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

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

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

The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command?

• • The switch can communicate with other hosts on the 172.16.100.0 network.

• • The switch can be remotely managed from a host on another network.

• The switch is limited to sending and receiving frames to and from the gateway 172.16.100.1

• • The switch will have a management interface with the address 172.16.100.1.

57. 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.

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

• • reconnaissance

• • Trojan horse

  
  

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.

61. 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