CCNA Exp1 Task Assessment Chp 5-OSI Network Layer

1-
Refer to the exhibit. The network in the exhibit is fully operational. What two statements correctly describe the routing for the topology that is shown? (Choose two.)
- 192.168.0.2 is the next-hop address that is used by R3 to route a packet from the 10.0.0.0 network to the 172.16.0.0 network.
- 10.0.0.1 is the next-hop address that is used by R1 to route a packet from the 192.168.12.0 network to the 10.0.0.0 network.

- 192.168.0.1 is the next-hop address that is used by R1 to route a packet from the 192.168.12.0 network to the 172.16.0.0 network.
- 172.16.0.1 is the next-hop address that is used by R3 to route a packet from the 10.0.0.0 to the 172.16.0.0 network.
- 192.168.0.1 is the next-hop address that is used by R2 to route a packet from the 172.16.0.0 network to the 192.168.12.0 network.
- 192.168.0.2 is the next-hop address that is used by R2 to route a packet from the 172.16.0.0 network to the 192.168.12.0 network.
2-
Refer to the exhibit. Using the network in the exhibit, what would be the default gateway address for host A in the 192.133.219.0 network?
- 192.135.250.1
- 192.31.7.1
- 192.133.219.0
- 192.133.219.1
               
3- Which three statements are true about routes and their use? (Choose three.)
- If no route to the destination network is found, the packet is returned to the previous router.
- If the destination network is directly connected, the router forwards the packet to the destination host.
- If multiple network entries exist for the destination network, the most general route is used to forward the packet.
- If no route exists for the destination network and a default route is present, the packet is forwarded to the next-hop router.
- If the originating host has a default gateway configured, the packet for a remote network can be forwarded using that route.
- If a host does not have a route manually configured for the destination network, the host will drop the packet.
               
4- Which intermediary devices could be used to implement security between networks? (Choose two.)
- router
- hub
- switch
- firewall
- access point
- bridge
               
5- What type of routing uses information that is manually entered into the routing table?
- dynamic
- interior
- static
- standard
6-
Refer to the exhibit. A network administrator notices that there are too many broadcasts on the network. What two steps can the network administrator take to resolve this problem? (Choose two.)
- Replace S2 with a router.
- Place all servers on S1.
- Disable TCP/IP broadcasts.
- Subnet the 192.168.0.0 /24 network.
- Disable all unused interfaces on the switches.
7-  
Refer to the exhibit. A network administrator is troubleshooting a connectivity problem and needs to determine the address that is used to forward network packets out the network. Using the netstat -r command, the administrator would identify which address as the address to which all hosts send packets that are destined for an outside network?
- 10.10.10.26
- 127.0.0.1
- 10.10.10.6
- 10.10.10.1
- 224.0.0.0
               
8- If the default gateway is configured incorrectly on the host, what is the impact on communications?
- The host is unable to communicate on the local network.
- The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.
- The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network.
- There is no impact on communications.
               
9- What is the purpose of a default gateway?
- physically connects a computer to a network
- provides a permanent address to a computer
- identifies the network to which a computer is connected
- identifies the logical address of a networked computer and uniquely identifies it to the rest of the network
- identifies the device that allows local network computers to communicate with devices on other networks
               
10- What statement describes the purpose of a default route?
- A host uses a default route to transfer data to another host on the same network segment.
- A host uses a default route to forward data to the local switch as the next hop to all destinations.
- A host uses a default route to identify the Layer 2 address of an end device on the local network.
- A host uses a default route to transfer data to a host outside the local network when no other route to the destination exists.
11- What are three common problems with a large network? (Choose three.)
- too few broadcasts
- performance degradation
- security issues
- limited management responsibility
- host identification
- protocol compatibility
12- In a connectionless system, which of the following is correct?
- The destination is contacted before a packet is sent.
- The destination is not contacted before a packet is sent.
- The destination sends an acknowledgement to the source that indicates the packet was received.
- The destination sends an acknowledgement to the source that requests the next packet to be sent.
               
13- Which portion of the network layer address does a router use to forward packets?
- host portion
- broadcast address
- network portion
- gateway address
               
14- What is a component of a routing table entry?
- the MAC address of the interface of the router
- the destination Layer 4 port number
- the destination host address
- the next-hop address
15-
Refer to the exhibit. All devices shown in the exhibit have factory default settings. How many broadcast domains are represented in the topology that is shown?
- 3
- 4
- 5
- 7
- 8
- 11

16- What information is added during encapsulation at OSI Layer 3?
- source and destination MAC
- source and destination application protocol
- source and destination port number
- source and destination IP address

17- 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
- source network address
- source MAC address
- well known port destination address
               
18- What two characteristics are commonly associated with dynamic routing protocols? (Choose two.)
- require no device configuration
- provide routers with up-to-date routing tables
- require less processing power than static routes require
- consume bandwidth to exchange route information
- prevent manual configuration and maintenance of the routing table
19- Which IP packet field will prevent endless loops?
- type-of-service
- identification
- flags
- time-to-live
- header checksum
               
20- 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? (Choose two.)
- The router sends an ARP request to determine the required next hop address.
- The router discards the packet.
- The router forwards the packet toward the next hop indicated in the ARP table.
- The router forwards the packet to the interface indicated by the source address.
- The router forwards the packet out the interface indicated by the default route entry.

21- What are the key factors to consider when grouping hosts into a common network? (Choose three.)
- gateways
- purpose
- physical addressing
- software version
- geographic location
- ownership
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