LabSim Linux+ 11.1
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Which of the following network protocols must be used to connect to the internet? 1) IPX/SPX (NWLINK) 2) TCP/IP 3) AppleTalk 4) NETBeui/NETBios
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2) TCP/IP
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Which of the following protocols allows hosts to exchange messages to indicate problems with packet delivery? 1) DHCP 2) IGMP 3) ICMP 4) ARP 5) TCP 6) IP
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3) ICMP
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Which of the following are NOT valid IP addresses? (select three). 1) 257.0.122.55 2) 145.8.260.7 3) 45.22.156.256 4) 116.0.0.116 5) 132.64.32.8 6) 1.55.254.3
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1, 2, & 3.
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Which of the following is a valid IPv6 address? 1) FECO:9087:AB04:9900:7GA2:7788:CEDF:349A 2) FECO::AB:9007 3) FECO:AB04:899A 4) 199.12.254.11 5) FECO:AB98::A7::9845:4567
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2) FECO::AB:9007
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You are configuring a network firewall to allow SMTP outbound e-mail traffic. Which of the following TCP/IP ports should you open on the firewall? (select two). 1) 25 2) 21 3) 143 4) 443 5) 110
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1) 25 5) 110
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With a growing concern for security, you convince your boss to stop allowing telnet access to the network. Remote connections will now be allowed only through the use of SSH. Which port must you allow through the firewall for SSH access? 1) 22 2) 23 3) 24 4) 25
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1) 22
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Which file in the Linux system lists all network services, including the port assigned to the service? (enter the full path to the file)
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/etc/services
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You want to maintain tight security on your internal network so you restrict access to the network through certain port numbers. If you want to allow users to continue to use DNS, which port should you enable? 1) 80 2) 53 3) 21 4) 42 5) 443
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2) 53
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Which of the following IP addresses is a valid IP address for a host on a public network? 1) 192.168.16.45 2) 172.16.254.12 3) 142.15.6.1 4) 10.3.125.2
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3) 142.15.6.1
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You have a computer that is connected to the internet through a NAT router. You want to use a private addressing scheme for your computer. Which of the following IP addresses could you assign to the computer? (select three). 1) 127.0.0.1 2) 10.0.12.15 3) 224.15.166.12 4) 32.188.99.10 5) 172.18.188.67 6) 192.168.12.253 7) 240.12.188.1
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2) 10.0.12.15 5) 172.18.188.67 6) 192.168.12.253
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Which of the following protocols includes extensive error checking to ensure that a transmission is sent and received without mistakes? 1) TCP 2) UDP 3) UCP 4) UDB
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1) TCP
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What is the network address for the address 199.78.240.240 if the default subnet mask is used? 1) 199.0.0.0 2) 198.78.0.0 3) 199.78.240.0 4) 199.78.240.240
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3) 199.78.240.0
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Which of the following correctly describe the most common format for expressing IPv6 addresses? (select two). 1) 32 numbers, grouped using colons. 2) Binary numbers 3) 128 numbers, grouped using colons. 4) Decimal numbers 5) Hexadecimal numbers
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1) 32 numbers, grouped using colons. 5) Hexadecimal numbers
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Which of the following IP addresses have a default subnet mask of 255.255.0.0? (select three). 1) 191.168.2.15 2) 129.0.0.1 3) 168.15.5.1 4) 123.254.19.6 5) 228.62.18.6 6) 1.6.45.254
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1) 191.168.2.15 2) 129.0.0.1 3) 168.15.5.1
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You are an application developer and are writing a program to exchange video files through a TCP/IP network. You need to select a transport protocol that will guarantee delivery. Which TCP/IP protocol would you implement that provides this capability? 1) UDP 2) TCP 3) RIP 4) IP 5) TFTP
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2) TCP
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To transfer files to your company's internal network from home, you use FTP. The administrator has recently implemented a firewall at the network perimeter and disabled as many ports as possible. Now you can no longer make the FTP connection. You suspect the firewall is causing the issue. Which ports need to remain open so you can still transfer the files? (select two). 1) 443 2) 23 3) 21 4) 20 5) 80
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3) 21 4) 20
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Which port number is used by the IMAP protocol? 1) 21 2) 143 3) 110 4) 25
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2) 143
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Which of the following are good reasons to enable NAT? 1) To translate between internet IP addresses and the IP addresses on your private network. 2) To prevent hackers from accessing your network. 3) To cache web pages. 4) To limit public access to just your DHCP server instead of your whole network.
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1) To translate between internet IP addresses and the IP addresses on your private network.
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What is the default subnet mask for address 132.44.156.67? 1) 255.0.0.0 2) 255.255.0.0 3) 255.255.255.0 4) 255.255.255.255
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2) 255.255.0.0
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Which port number is used by SNMP? 1) 25 2) 110 3) 119 4) 143 5) 161
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5) 161
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Which of the following are valid IPv6 addresses? (select all that apply). 1) 6384:1319:7700:7631:446A:5511:8940:2552 2) 343F:1EEE:ACDD:2034:1FF3:5012 3) A82:5B67:7700:AH0A:446A:779F:FFE3:0091 4) 165.15.78.53.100.1 5) 141:0:0:0:15:0:0:1
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1) 6384:1319:7700:7631:446A:5511:8940:2552 5) 141:0:0:0:15:0:0:1
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Your computer has an IP address of 161.13.5.15. Your computer is on a? 1) Multicast network 2) Public network 3) Class C network 4) Private network
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2) Public network
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Which port does Telnet use? 1) 34 2) 25 3) 23 4) 80
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3) 23
