Deck 4: Network Protocols and Routing

Question 1

 In general, a Layer 3 or Layer 4 switch is still optimized for fast Layer 2 data handling.

Answer 1

True

Question 2

 What utility is the equivalent to the pathping command on a Linux system?

A) mtr
B) tracepath
C) traceroute
D) hping

Answer 2

A

Question 3

 The Border Gateway Protocol is considered to be a hybrid routing protocol.

Answer 3

True

Question 4

 The pathping utility sends 10 pings per hop by default.

Question 5

 What command will list only current connections, including IP addresses and port numbers?

A) show ip stats
B) netstat -n
C) netstat -s
D) portstat

Question 6

 IPv4 and IPv6 use the same packet format.

Question 7

 The IP connectionless protocol relies on what other protocol to guarantee delivery of data?

A) UDP
B) ICMP
C) TCP
D) ARP

Question 8

 What is NOT one of the three characteristics of TCP in its role as a reliable delivery protocol?

A) Connection-oriented Protocol
B) Sequencing and checksums
C) Framing
D) Flow Control

Question 9

 Routing Information Protocol (RIP) is an interior gateway protocol that uses a link-state algorithm.

Question 10

 TCP uses a four-step process called a four-way handshake to establish a TCP connection.

Question 11

 You are connected to your network's Cisco router, and need to verify the route table. What command should you enter?

A) route print
B) show ip route
C) route -a
D) show route-table

Question 12

 In a TCP segment, what field indicates how many bytes the sender can issue to a receiver before acknowledgment is received?

A) urgent pointer
B) sliding-window
C) URG flag
D) PSH flag

Question 13

 UDP provides error checking, but not sequencing.

Question 14

 Which of the following is not a task handled by a router?

A) A router forwards broadcasts over the network.
B) A router can reroute traffic if the path of first choice is down but a second path is available.
C) A router can interpret Layer 3 and often Layer 4 addressing.
D) A router can connect dissimilar networks.

Question 15

 The cost of upgrading infrastructure has been a major factor in the slow adoption of IPv6.

Question 16

 Which traceroute command will perform a trace using ICMP echo requests instead of UDP datagrams to the host srv1.mycompany.com?

A) traceroute -i srv1.mycompany.com
B) traceroute -w srv1.mycompany.com
C) traceroute -o ICMP srv1.mycompany.com
D) traceroute -I srv1.mycompany.com

Question 17

 IP is an unreliable, connectionless protocol, as it does not establish a session to send its packets.

Question 18

 Which statement regarding the Border Gateway Protocol (BGP) is accurate?

A) BGP is limited to a single autonomous system.
B) BGP is exclusively a distance-vector protocol.
C) BGP utilizes TCP for communicating updates.
D) BGP is a more advanced version of OSPF.

Question 19

 The CTRL + S key combination can be used to stop an actively running command.

Question 20

 What field in an IPv4 packet informs routers the level of precedence they should apply when processing an incoming packet?

A) Differentiated Services (DiffServ)
B) Internet header length (IHL)
C) Time to Live (TTL)
D) Padding

Question 21

 If the VLAN tag is present in an Ethernet frame, what is the maximum frame size?

A) 1492 bytes
B) 1500 bytes
C) 1518 bytes
D) 1522 bytes

Question 22

 What IPv6 field is similar to the TTL field in IPv4 packets?

A) flow label
B) next header
C) hop limit
D) distance vector

Question 23

 What happens when a router receives a packet with a TTL of 0?

A) The router drops the packet and sends an ICMP TTL expired message back to the host.
B) The router attempts to forward the traffic on a local network.
C) The router resets the TTL to 128.
D) The router marks the packet as corrupted and forwards it to the next hop.

Question 24

 What occurs when a collision happens on a network?

A) The collision goes undetected, and data transmission continues.
B) The collision will create an error in the network switch, but otherwise, no issues will occur as a result.
C) Each node on the network stops transmitting, until manually told to reconnect and transmit.
D) Each node on the network waits a random amount of time and then resends the transmission.

Question 25

 You have been tasked with maintaining a network that is jumbo frame enabled. What does this mean?

A) The MTU for the network can be as high as 9198 bytes.
B) The network is not based on the Ethernet standard.
C) Fragmented frames will be consolidated into whole frames before being sent.
D) The MTU for the network is set at 65,535 bytes.

Question 26

 When using the Routing Information Protocol (RIP), what is the maximum number of hops a message can take between its source and its destination before the destination is considered unreachable?

A) 8
B) 15
C) 20
D) 32

Question 27

 What routing metric affects a path's potential performance due to delay?

A) theoretical bandwidth
B) MTU
C) latency
D) load

Question 28

 What is routing protocol convergence time defined as?

A) It is the time it takes for the protocol to recognize the best path in the event of a network change.
B) It is the time it takes for the protocol to recognize that a change has occurred.
C) It is the amount of time it takes after initial configuration of the protocol for all routes to become known.
D) It is the amount of time involved in configuration of the routing protocol.

Question 29

 What is the purpose of the checksum TCP field?

A) It specifies special options, such as the maximum segment size a network can handle.
B) It allows the receiving node to determine whether the TCP segment became corrupted during transmission.
C) It identifies the data segment's position in the stream of data segments being sent.
D) It confirms receipt of data via a return message to the sender.

Question 30

 Which routing protocol started as a Cisco proprietary protocol and combines some of the features of a link-state protocol with that of distance-vector protocols?

A) IS-IS
B) BGP
C) OSPF
D) EIGRP

Question 31

 By default, what is the MTU size on a typical Ethernet network?

A) 1492 bytes
B) 1500 bytes
C) 1518 bytes
D) 1522 bytes

Question 32

 In the event of a duplicate MAC address shared by two hosts on a switched network, what statement is accurate?

A) The hosts that share the same MAC addresses will be completely unable to communicate with any other devices.
B) The hosts will generate new MAC addresses until the conflict is resolved.
C) The hosts will still send and receive traffic, but traffic may not always reach the correct destination.
D) The network switch will eventually crash due to being unable to properly forward traffic.

Question 33

 In IPv6, what field is used to indicate what sequence of packets from one source to one or multiple destinations a packet belongs to?

A) traffic class
B) group ID
C) flow label
D) traffic exchange

Question 34

 Which command will produce statistics about each message transmitted by a host, separated according to protocol type?

A) ipconfig -s
B) netstat -s
C) ipstat -a
D) netstat -an

Question 35

 What tcpdump command can be used to filter out all traffic except SSH traffic?

A) tcpdump port 22
B) tcpdump -p 22
C) tcpdump only ssh
D) tcpdump -f +ssh

Question 36

 Routing protocols that enable routers to communicate beyond neighboring routers, allowing each router to independently map the network, are known as which type of protocols?

A) interior gateway protocols
B) border gateway protocols
C) distance vector protocols
D) link-state protocols

Question 37

 Originally codified by ISO, what does the "intermediate system" in IS-IS (Intermediate System to Intermediate System) stand for?

A) The autonomous systems used by an organization.
B) An entire network consisting of various network devices.
C) The administrative boundaries of an organization.
D) An IS-IS capable network router.

Question 38

 You have been tasked with the replacement of OSPF with EIGRP throughout your organization, which consists of a mixture of Cisco routers and routers from other vendors. What statement is accurate?

A) EIGRP will increase CPU utilization on core routers.
B) Increased traffic will result from the switch to EIGRP.
C) EIGRP may not be available on non-Cisco routers.
D) Convergence time will be increased with EIGRP.

Question 39

 What statement regarding the differences between the Windows tracert utility and the Linux/UNIX/macOS traceroute utility is accurate?

A) Only tracert can send UDP messages for tracing a path.
B) By default, the tracert utility uses ICMP echo requests, while traceroute uses UDP datagrams or TCP SYN messages.
C) The Windows tracert utility does not place limits on the TTL of repeated trial messages.
D) The tracert utility expects an ICMP port unreachable error message as the final reply to a trace.

Question 40

 Which statement does NOT accurately describe characteristics of the OSPF protocol?

A) OSPF maintains a database of other routers' links.
B) OSPF has no hop limits on a transmission path.
C) OSPF provides low network overhead.
D) OSPF requires very little CPU or memory resources.

Question 41

 What are the different categories of routers, and how do they compare?

Question 42

 How is the TTL (Time to Live) field utilized in IPv4?

Question 43

 How can a network switch be said to operate at Layer 4 of the OSI model?

Question 44

 There are several interior gateway protocols, but only one current exterior gateway protocol. What is this protocol, and what characteristics does it have?

Question 45

 How are routing paths determined?

Question 46

 How does IPv6 utilize Neighbor Discovery Protocol to detect neighboring devices?

Question 47

 What are some examples of routing metrics that can be used to determine the best path for a network?

Question 48

 What are some of the basic functions of a network router?

Question 49

 ARP tables might contain two different types of entries. What are they, and how are they created?

Question 50

 What is MAC address spoofing?