CCNA Network Fundamentals 5 and 6
Which of the following network devices are recommended to be assigned static IP addresses?
servers, network printers, and routers
What information is added during encapsulation at OSI Layer 3?
source and destination IP address
What is a component of a routing table entry?
the next-hop address
What are not key factors to consider when grouping hosts into a common network?
Gateways, physical addressing, and software version,
Which three statements are true about routes and their use?
1. If the destination network is directly connected, the router forwards the packet to the destination host. 2. If no route exists for the destination network and a default route is present, the packet is forwarded to the next-hop router. 3. If the originating host has a default gateway configured, the packet for a remote network can be forwarded using that route.
Which statements are true regarding IP addressing?
1. Private addresses are blocked from public Internet by router. 2. IP address 127.0.0.1 can be used for a host to direct traffic to itself.
When the destination network is not listed in the routing table of a Cisco router, what are two possible actions that the router might take?
1. The router discards the packet 2. The router forwards the packet out the interface indicated by the default route entry.
What two things will happen if a router receives an ICMP packet which has a TTL value of 1 and the destination host is several hops away?
1. The router will discard the packet 2. The router will send a time exceeded message to the source host.
What facts are true about the network portion of an IPv4 address?
1. is identical for all hosts in a broadcast domain 2. varies in length 3. is used to forward packets
What two characteristics are commonly associated with dynamic routing protocols?
1. provide routers with up-to-date routing tables 2. consume bandwidth to exchange route information
Which IP addresses are private?
10.35.66.70 192.168.99.5 172.18.88.90
What is the network address of the host 172.25.67.99 /23 in binary?
10101100.00011001.01000010.00000000
A router interface has been assigned an IP address of 172.16.192.166 with a mask of 255.255.255.248. To which subnet does the IP address belong?
172.16.192.160
Which IPv4 subnetted addresses represent valid host addresses?
172.16.4.155 /26 172.16.4.193 /26 172.16.4.207 /27
Which IP address are NOT private?
172.168.33.1 192.33.55.89 172.35.16.5
What subnet mask would a network administrator assign to a network address of 172.30.1.0 if it were possible to have up to 254 hosts?
255.255.255.0
How many bits make up an IPv4 address?
32
What statement describes the purpose of a default route?
A host uses a default route to transfer data to a host outside the local network when no other route to the destination exists.
Which of the following network devices are NOT recommended to be assigned static IP addresses?
LAN workstations, remote workstations, laptops
Which portion of the network layer address does a router use to forward packets?
Network portion
What are three common problems with a large network?
Performance degradation, security issues, host identification
What are the key factors to consider when grouping hosts into a common network?
Purpose, geographic location, ownership
Which intermediary devices could be used to implement security between networks?
Router and firewall
What type of routing uses information that is manually entered into the routing table?
Static
In a connectionless system, which of the following is correct?
The destination is not contacted before a packet is sent.
If the default gateway is configured incorrectly on the host, what is the impact on communications?
The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.
Given the IP address and subnet mask of 172.16.134.64 255.255.255.224, which of the following would describe this address?
This is a network address
Which IP packet field will prevent endless loops?
Time to live
What is a group of hosts called that have identical bit patterns in the high order bits of their addresses?
a network
Which process do routers use to determine the subnet network address based upon a given IP address and subnet mask?
binary ANDing
In an IPv4 environment, what information is used by the router to forward data packets from one interface of a router to another?
destination network address
What is the primary reason for development of IPv6?
expanded addressing capabilities
Which intermediary devices ARE NOT used to implement security between networks?
hub, switch, access point, and bridge
What is the purpose of a default gateway?
identifies the device that allows local network computers to communicate with devices on other networks
