CCST - Networking

Which is a characteristic of the network SSID?

• • It is encrypted by default.

• • It is case sensitive.

• • It contains exactly 16 characters.

• • It is only required for guest access.

What is the function of the SSID on a wireless network?

• • It identifies the wireless protocol in use.

• • It contains the password required to join the network.

• • It identifies the wireless standard required to join the network.

• • It identifies the WLAN in use on the network.

What is the purpose of protocols in data communications?

• • specifying the device operating systems that will support the communication

• • dictating the content of the message sent during communication

• • specifying the bandwidth of the channel or medium for each type of communication

• • providing the rules required for a specific type of communication to occur

Which two functions are primary functions of a router? (Choose two.)

• • packet forwarding

• • domain name resolution

• • MAC address assignment

• • path selection

Answer explanation

A router accepts a packet and accesses its routing table to determine the appropriate exit interface based on the destination address. The router then forwards the packet out of that interface.

What three blocks of addresses are defined by RFC 1918 for private network use? (Choose three.)

• • 172.16.0.0/12

• • 169.254.0.0/16

• • 192.168.0.0/16

• • 10.0.0.0/8

• • 100.64.0.0/14

Answer explanation

RFC 1918, Address Allocation for Private Internets, defines three blocks of IPv4 address for private networks that should not be routable on the public Internet.

• 10.0.0.0/8

• 172.16.0.0/12

• 192.168.0.0/16

Consider the group of five IPv4 addresses each with the subnet mask of 255.255.255.0. Which two IPv4 addresses belong to the same local network? (Choose two.)

• • 192.168.10.2

• • 193.168.10.16

• • 192.167.10.74

• • 192.168.10.56

• • 192.168.100.62

• Which IPv6 address notation is valid?

• • 2001:0DB8::ABCD::1234

• • 2001::ABCD::

• • ABCD:160D::4GAB:FFAB

• • 2001:DB8:0:1111::200

Answer explanation

IPv6 addresses are represented by 32 hexadecimal digits (0-9, A-F). The size of the notation can be reduced by eliminating leading zeroes in any hextet and by replacing a single, contiguous string of hextets containing all zeroes with a double colon, which can only be used one time.

When IPv4 is configured for a computer on a network, what does the subnet mask identify?

• • the dynamic subnetwork configuration

• • the device that the computer uses to access another network

• • the part of the IP address that identifies the network

• • the pool of addresses assigned within the network

Answer explanation

The IP addressing system is a hierarchical addressing system. An IP address is made up of two parts: the network address and the host address. For IPv4, the subnet mask is used to identify which portion of an IPv4 address is the network address and which portion is the host address.

What is one difference between a switch and a router?

• • A router creates smaller broadcast domains, and a switch extends the size of a broadcast domain.

• • A router provides segmentation at Layer 2, and a switch provides segmentation at Layer 3.

• • A router uses a routing table to store information about destination host IP addresses, and a switch uses an ARP table to store information about destination host MAC addresses.

• • A router propagates broadcast messages, and a switch does not propagate broadcast messages.

What is a benefit of adding a router within an IP network?

• • reduces the number of hosts that can connect to the network

• • increases the size of the local network

• • controls host-to-host traffic within a single local network

• • keeps broadcasts contained within a local network

Answer explanation

Routers can divide or segment a network. Because routers do not forward broadcasts they can keep broadcasts isolated to the local network.