CompTIA A+ Cert Master Networking 2.5 Study

IPv6, designed to replace IPv4, has proven challenging to implement in transition. Hosts and routers that can operate on IPv4 and IPv6 simultaneously are called what?

Dual stack

Why would a network engineer choose a dynamic network addressing configuration over a static configuration in a large network? (Select all that apply.)

Dynamic addressing provides automatic address allocation, reducing the time required to manage large networks. Static addressing is prone to configuration errors in large networks. Static addressing can be time-consuming in large networks.

A class B IPv4 host configured with a private IP address will use what mechanisms to facilitate access to the internet? (Select all that apply.)

Proxy device A proxy device can fulfill requests for internet resources on behalf of clients configured with a private IP address, facilitating internet access. Network address translation (NAT) Hosts configured with a private address cannot access the internet directly. A host must use some mechanism to allow it to forward packets. Network address translation (NAT) is one. It shuttles traffic between the private and public addresses.

To communicate on the internet, a network administrator must configure hosts with what type of unique IP address?

Public IP address A network administrator must configure a host with a unique public IP address to communicate on the internet. Public IP addresses are allocated to customer networks by internet service providers (ISPs).

An IT helpdesk technician has received a service call for a small home office worker experiencing network connectivity issues. The IPv4 network host can communicate with other local hosts but fails to reach the internet. What should the technician check?

The default gateway The default gateway in an IPv4 network is the address of the router. While the default gateway setting is not required, failure to enter the default gateway would limit the hosts to local network communication only.

An IPv6 address is 128-bits, divided into two main parts. The first 64 bits and the second 64 bits are known as what?

Network ID Interface ID An IPv6 address is split into two parts: a network and a node component. The network component is the first 64 bits of the address and is used for routing. The node component is the later 64 bits and is used to identify the address of the interface.

In IPv6, it is possible to configure addresses statically. However, most hosts obtain their global and link-local addresses from the local router. In IPv6, the network and host portions are a fixed size. What part of this IPv6 IP address is the network ID 2001:0db8:0000:0000:0abc:0000:def0:1234?

2001:0db8:0000:0000 2001:0db8:0000:0000 is the network ID 0abc:0000:def0:1234 is the interface ID portion.

A technician is troubleshooting an IPv4 network that only allows hosts to communicate with other local hosts on the same network and notices the Dynamic Host Configuration Protocol (DHCP) service failed. What failover mechanism are the local hosts using to communicate on the network?

Automatic private IP addressing (APIPA) Windows machines will default to APIPA, also known as link-local if the DHCP service fails. APIPA allows the hosts to communicate with other hosts on the same network.

Suppose the Dynamic Host Configuration Protocol (DHCP) service fails in a Windows network. What will Windows network machines default to that will allow them to communicate with other hosts on the same network?

Automatic private IP addressing (APIPA) Windows machines will default to APIPA, also known as link-local, if the DHCP service fails or if there is some connectivity error. It allows them to communicate with other hosts on the same network.

Windows machines will default to Automatic Private IP Addressing (APIPA), also known as link-local, if which Windows network service fails?

Dynamic Host Configuration Protocol (DHCP) If the DHCP service fails, Windows machines will default to APIPA, also known as link-local, allowing them to communicate with other hosts on the same network.

What method of network addressing provides automatic address allocation, is less prone to errors, and requires less administration time?

Dynamic addressing With a Dynamic Host Configuration Protocol (DHCP) server, dynamic addressing provides automatic address allocation, is less prone to configuration errors, and reduces administration time.

Why would hosts NOT need to be configured with a default gateway in an IPv6 implementation with Stateless Address Auto Configuration (SLAAC)?

ND allows hosts to discover a router and perform interface address querying functions. IPv6 uses a protocol called neighbor discovery (ND), implementing SLAAC and allowing a host to discover a router and perform interface address querying functions.