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
The routing table data structure contains all the information necessary to forward an IP data packet toward its destination. Each routing table entry describes the collection of best paths to a particular destination. When forwarding an IP data packet, the routing table entry providing the best match for the packet’s IP destination is located. The matching routing table entry then provides the next-hop address towards the packet’s destination
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.
If there is a default route, it forwards the packet to the interface indicated by the default route, otherwise it drops the packet.
What type of routing uses information that is manually entered into the routing table?
- dynamic
- interior
- static
- standard
Ans: static
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
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.
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
Which portion of the network layer address does a router use to forward packets?
- host portion
- broadcast address
- network portion
- gateway address
pretty crazy question, quite hard to answer, where are the real answer? who says it’s the network portion? duh!?
Which IP packet field will prevent endless loops?
- type-of-service
- identification
- flags
- time-to-live
- header checksum
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.
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
