Module 1- 50-75

Question 1

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?

Answer 1

255.255.255.128

Question 2

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

Answer 2

Neighbor Solicitation

Router Advertisement

Question 3

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

Answer 3

HTTP

Question 4

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

Answer 4

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

Explanation: IMAP and POP are protocols that are used to retrieve email messages. The advantage of using IMAP instead of POP is that when the user connects to an IMAP-capable server, copies of the messages are downloaded to the client application. IMAP then stores the email messages on the server until the user manually deletes those messages.

Question 5

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?

Answer 5

nslookup

Traceroute (tracert) is a utility that generates a list of hops that were successfully reached along the path from source to destination.This list can provide important verification and troubleshooting information. The ipconfig utility is used to display the IP configuration settings on a Windows PC. The Netstat utility is used to identify which active TCP connections are open and running on a networked host. Nslookup is a utility that allows the user to manually query the name servers to resolve a given host name. This utility can also be used to troubleshoot name resolution issues and to verify the current status of the name servers.

Question 6

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

Answer 6

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

Other case-
handles communication between upper layer networking software and Ethernet NIC hardware

adds Ethernet control information to network protocol data

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

adds Ethernet control information to network protocol data

enables IPv4 and IPv6 to utilize the same physical medium

adds Ethernet control information to network protocol data

handles communication between upper layer networking software and Ethernet NIC hardware

enables IPv4 and IPv6 to utilize the same physical medium

Question 7

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

Answer 7

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

Question 8

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

Answer 8

Communication between the switch and remote users is encrypted.

Question 9

58.

Answer 9

Look on the site

Question 10

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?

Answer 10

reconnaissance

Question 11

What service is provided by HTTP?

Answer 11

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

Question 12

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

Answer 12

DHCP

Question 13

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

Answer 13

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.

Question 14

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.)

Answer 14

ping
ipconfig
nslookup

Question 15

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?

Answer 15

switch the packet to the directly connected interface

Question 16

What characteristic describes antispyware?

Answer 16

applications that protect end devices from becoming infected with malicious software

Question 17

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?

Answer 17

SSH

Question 18

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

Answer 18

Update the operating system and other application software.
Install and update antivirus software.

Question 19

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

Answer 19

Trojan horse

Question 20

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?

Answer 20

frame check sequence field

Question 21

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?

Answer 21

255.255.255.248

Question 22

What service is provided by POP3?

Answer 22

Retrieves email from the server by downloading the email to the local mail application of the client.

Question 23

What two security solutions are most likely to be used only in a corporate environment? (Choose two.)

Answer 23

virtual private networks
intrusion prevention systems

Question 24

What characteristic describes antivirus software?

Answer 24

applications that protect end devices from becoming infected with malicious software

Question 25

What mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network?

Answer 25

It decrements the value of the TTL field by 1 and if the result is 0, it discards the packet and sends a Time Exceeded message to the source host.

Question 26

A client packet is received by a server. The packet has a destination port number of 69. What service is the client requesting?

Answer 26

TFTP