A+ Chapter 6 - Review Questions Introduction to TCP/IP

It can't reach the DHCP server. (The address assigned to the computer is an APIPA address. Microsoft client computers (and others) will configure themselves with an address in this range if they are unable to reach a DHCP server.)

The workstations on your network are configured to use a DHCP server. One of the workstations can't communicate with other computers. Its IP address is 169.254.1.18. What could be the problem? The subnet mask is wrong. It has a private IP address. The default gateway is wrong. It can't reach the DHCP server.

Acknowledged delivery Virtual circuits (TCP is a connection-oriented protocol that establishes virtual circuits and acknowledges delivery of packets. Because of these features, it has higher overhead than UDP and is a little slower.)

What are advantages that TCP has over UDP? (Choose two.) Acknowledged delivery Faster delivery Lower overhead Virtual circuits

None of the above (An IPv6 interface is not limited in the number of addresses that can be assigned, although there could be limitations based on practicality.)

What is the maximum number of IPv6 addresses that can be assigned to one IPv6 interface? One (unicast) Two (unicast and anycast) Three (unicast, anycast, and multicast) None of the above

3389 (Remote Desktop Protocol (RDP) works on port 3389. DNS works on port 53, IMAP4 works on port 143, and LDAP works on port 389.)

What port does the RDP protocol work on? 53 143 389 3389

HTTP (HTTP uses port 80. HTTPS uses port 443, Telnet uses port 23, and POP3 uses port 110.)

Which TCP/IP protocol uses port 80? HTTP HTTPS Telnet POP3

SNMP, 161 and 162 (Simple Network Management Protocol (SNMP) is used for networking device administration and management. It uses ports 161 and 162. Simple Mail Transfer Protocol (SMTP) is for sending email and uses port 25.)

Which network protocol is used for administration of networking devices such as routers and switches, and which port(s) does it use? SNMP, 161 and 162 SNMP, 25 SMTP, 25 SMTP, 161 and 162

10.25.11.33 (DNS servers resolve hostnames to IP addresses. On the Internet, a DNS server needs to have a public IP address. The address 10.25.11.33 is in a private address space, so that address would not be valid for a DNS server on the Internet.)

Which of the following IP addresses would not be valid for a DNS server on the Internet? 10.25.11.33 18.33.66.254 155.118.63.11 192.186.12.2

DKIM (DKIM authenticates messages from email servers using private-public encrypted key pairs. SPF authenticates via IP addresses. DMARC is a TXT record that allows an administrator to specify how they want rejected emails to be handled. VLAN is a virtual LAN and is not a TXT record type.)

An email administrator wants to help protect against their server being spoofed to send spam. They were told that they can do this with a TXT record in their DNS server. If they want to authenticate emails using an encrypted security key, which TXT record would be most appropriate? DMARC VLAN SPF DKIM

2001:0db8:3c4d:0012:0000:0000:1234:56ab ::ffff:c0a8:173 2001:db8:3c4d:12::1234:56ab (An IPv6 address contains 128 bits, written in eight 16-bit fields represented by four hexadecimal digits. Option A contains all eight fields expressed in full. Option B is an IPv4 address expressed in IPv6 form. Option C is the same address as option A, but written in accepted shorthand. Option D is not valid because the double colons (::) can be used only once within an address.)

Which of the following are valid examples of IPv6 addresses? (Choose all that apply.) 2001:0db8:3c4d:0012:0000:0000:1234:56ab ::ffff:c0a8:173 2001:db8:3c4d:12::1234:56ab 2001::1ab4::5468

None of the above ( IPv6 does not have broadcasts. IPv6 does have multicasts, which are a bit like targeted broadcasts. FF00:: is the first part of a multicast address.)

Which of the following is an IPv6 broadcast address? ::1 FE80:: FF00:: ::FFFF None of the above

VPN (A virtual private network (VPN) is a secure point-to-point connection made over a public network. NAT translates private IP addresses to public IP addresses. APIPA is an automatic IP address assignment if a client computer can t reach a DHCP server. VLANs are virtual local area networks configured through switches.)

Which of the following is the name of a secure point-to-point connection made over a public network? NAT APIPA VLAN VPN

ARP (The Address Resolution Protocol (ARP) resolves IP addresses to hardware (MAC) addresses. RARP does the reverse—it resolves MAC addresses to IP addresses. DNS resolves hostnames to IP addresses. DHCP automatically configures TCP/IP clients.)

Which of the following protocols is responsible for resolving IP addresses to hardware addresses? DNS DHCP ARP RARP

SMTP (Simple Mail Transfer Protocol (SMTP) is responsible for sending email. IMAP4 and POP3 both receive email. SNMP is a network management protocol.)

Which of the following protocols is responsible for sending email? IMAP4 POP3 SMTP SNMP

IMAP4 (IMAP4 and POP3 are the two protocols that are used for email retrieval. Of the two, only IMAP4 provides security features. SMTP sends email. SNMP is a network management protocol.)

Which of the following protocols is used for secure retrieval of email? SMTP SNMP POP3 IMAP4

LDAP (Lightweight Directory Access Protocol (LDAP) is designed to access information stored in an information directory typically known as an LDAP directory or LDAP database. This typically includes employee data and network configuration data. FTP is designed to transfer files. RDP is a remote desktop protocol, and CIFS is used to share files and printers.)

Which of the following protocols was designed to access information stored in an information directory, such as employee phone books? FTP LDAP RDP CIFS

Default gateway (The router is your doorway out into other networks, and it is known in TCP/IP terms as the default gateway. Without this configuration option, you would not be able to get to external networks. The subnet mask tells a host which network it s on. The DNS server resolves hostnames to IP addresses, and a DHCP server provides IP configuration information to hosts.)

You are manually configuring a TCP/IP host. Another administrator gives you the router's IP address. What is the TCP/IP term for this? Default gateway Subnet mask DNS server DHCP server

DNS (DNS is typically known as a name resolver on the Internet, but it will work on private networks as well. DNS resolves hostnames to IP addresses. DHCP automatically configures clients with IP address information. FTP is for file downloads. APIPA is a process used to assign clients a private IP address automatically when they can t reach the DHCP server.)

You are setting up a small network that will not connect to the Internet. You want computers to be able to locate each other by using hostnames. What service will do this? DNS DHCP FTP APIPA

DHCP (A Dynamic Host Configuration Protocol (DHCP) server provides IP configuration information to hosts when they join the network. A Domain Name System (DNS) server resolves hostnames to IP addresses. Network Address Translation (NAT) translates private IP addresses into public IP addresses. There is no IP configuration server (other than a DHCP server).)

You have just set up a network that will use the TCP/IP protocol, and you want client computers to obtain IP configuration information automatically. Which type of server do you need for this? DNS DHCP NAT IP configuration server

HTTPS (The HTTP protocol is inherently unsecure, but the HTTPS protocol is secure. (SSH and TLS are secure as well, but they are not protocols used to connect to websites.)

Your friend is concerned about the security of making an online purchase. What should you tell them to look for in the address bar of the web browser? HTTP HTTPS SSH TLS

IP address Subnet mask (The only mandatory IPv4 configuration items are an IP address and a subnet mask. If you are not connecting to another network, you do not need a default gateway. DNS servers resolve hostnames to IP addresses, but they are not mandatory.)

Your network is running IPv4. Which of the configuration options are mandatory for your host to communicate on the network? (Choose two.) IP address Subnet mask Default gateway DNS server address