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web.groovymark@gmail.com
- December 3, 2024
Question 41
Which of the following ports is used for FTP control traffic?
a) 20
b) 21
c) 22
d) 23
Correct Answer: b) 21
Explanation: FTP control traffic uses TCP port 21 for establishing and managing the connection.
Question 42
Which of the following network devices operates at Layer 2 of the OSI model and uses MAC addresses to forward data?
a) Router
b) Switch
c) Hub
d) Firewall
Correct Answer: b) Switch
Explanation: A switch operates at Layer 2 (Data Link Layer) and uses MAC addresses to forward data to the correct destination.
Question 43
Which of the following is a primary function of a proxy server?
a) Assign IP addresses to clients
b) Cache web content
c) Manage network routing
d) Provide DNS resolution
Correct Answer: b) Cache web content
Explanation: A proxy server caches web content to reduce bandwidth usage and improve access speed to frequently visited websites.
Question 44
What type of IP address is 169.254.10.23?
a) Public
b) Private
c) Loopback
d) APIPA
Correct Answer: d) APIPA
Explanation: An IP address in the 169.254.x.x range is automatically assigned by a device when it cannot obtain an IP address from a DHCP server. This is known as APIPA (Automatic Private IP Addressing).
Question 45
A company requires that all workstations on the network have the same IP address each time they connect to the network. Which of the following options should the network administrator configure?
a) Dynamic IP addresses
b) Static IP addresses
c) DHCP reservations
d) NAT
Correct Answer: c) DHCP reservations
Explanation: DHCP reservations allow the same IP address to be assigned to a device each time it connects to the network.
Question 46
Which of the following is a default routing protocol used by routers on the Internet to exchange routing information between different networks?
a) RIP
b) EIGRP
c) OSPF
d) BGP
Correct Answer: d) BGP
Explanation: Border Gateway Protocol (BGP) is the default protocol used by routers to exchange routing information across the Internet.
Question 47
Which of the following DNS records is used to map a domain name to an IPv6 address?
a) A
b) AAAA
c) MX
d) CNAME
Correct Answer: b) AAAA
Explanation: AAAA (Quad-A) records are used in DNS to map domain names to IPv6 addresses.
Question 48
A network administrator is setting up a virtual private network (VPN) to allow remote employees to securely access the company’s internal resources. Which of the following protocols should the administrator use for this purpose?
a) HTTPS
b) IPSec
c) FTP
d) SNMP
Correct Answer: b) IPSec
Explanation: IPSec is commonly used to create secure VPN connections by encrypting data between the remote user and the internal network.
Question 49
What command can be used on a Linux machine to test network connectivity and determine the amount of time it takes to reach a destination?
a) ping
b) nslookup
c) dig
d) arp
Correct Answer: a) ping
Explanation: The ping command sends ICMP Echo Requests to test network connectivity and measure round-trip time.
Question 50
Which of the following protocols is used to securely transfer files over a network and operates over port 22?
a) FTP
b) FTPS
c) SFTP
d) HTTP
Correct Answer: c) SFTP
Explanation: SFTP (SSH File Transfer Protocol) is used to securely transfer files over a network and operates over TCP port 22.
